diff --git a/CHANGELOG.md b/CHANGELOG.md
index 48ea0cd..d686425 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+- [#9](https://github.com/green-code-initiative/ecoCode-php/pull/9) Upgrade licence system and licence headers of Java files
+
 ### Deleted
 
 ## [1.4.0] - 2023-08-08
diff --git a/pom.xml b/pom.xml
index ab3aaac..3bb2e30 100644
--- a/pom.xml
+++ b/pom.xml
@@ -9,6 +9,7 @@
 
     <name>ecoCode - PHP language</name>
     <description>Provides rules to reduce the environmental footprint of your PHP programs</description>
+    <inceptionYear>2023</inceptionYear>
     <url>https://github.com/green-code-initiative/ecoCode-php</url>
     <organization>
         <name>green-code-initiative</name>
@@ -251,6 +252,34 @@
                     </execution>
                 </executions>
             </plugin>
+            <plugin>
+                <groupId>com.mycila</groupId>
+                <artifactId>license-maven-plugin</artifactId>
+                <version>4.1</version>
+                <configuration>
+                    <properties>
+                        <owner>Green Code Initiative</owner>
+                        <email>https://www.ecocode.io</email>
+                    </properties>
+                    <licenseSets>
+                        <licenseSet>
+                            <header>com/mycila/maven/plugin/license/templates/GPL-3.txt</header>
+                            <includes>
+                                <include>**/*.java</include>
+                            </includes>
+                        </licenseSet>
+                    </licenseSets>
+                </configuration>
+                <executions>
+                    <execution>
+                        <id>validate</id>
+                        <goals>
+                            <goal>check</goal>
+                        </goals>
+                        <phase>validate</phase>
+                    </execution>
+                </executions>
+            </plugin>
         </plugins>
     </build>
 </project>
diff --git a/src/main/java/fr/greencodeinitiative/php/PHPPlugin.java b/src/main/java/fr/greencodeinitiative/php/PHPPlugin.java
index 1a7afec..81d6945 100644
--- a/src/main/java/fr/greencodeinitiative/php/PHPPlugin.java
+++ b/src/main/java/fr/greencodeinitiative/php/PHPPlugin.java
@@ -1,15 +1,16 @@
 /*
- * Copyright (C) 2023 Green Code Initiative
+ * ecoCode - PHP language - Provides rules to reduce the environmental footprint of your PHP programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 3 of the License, or (at your option) any later version.
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
diff --git a/src/main/java/fr/greencodeinitiative/php/PhpRuleRepository.java b/src/main/java/fr/greencodeinitiative/php/PhpRuleRepository.java
index 51a82b4..9a32409 100644
--- a/src/main/java/fr/greencodeinitiative/php/PhpRuleRepository.java
+++ b/src/main/java/fr/greencodeinitiative/php/PhpRuleRepository.java
@@ -1,15 +1,16 @@
 /*
- * Copyright (C) 2023 Green Code Initiative
+ * ecoCode - PHP language - Provides rules to reduce the environmental footprint of your PHP programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 3 of the License, or (at your option) any later version.
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
diff --git a/src/main/java/fr/greencodeinitiative/php/checks/AvoidDoubleQuoteCheck.java b/src/main/java/fr/greencodeinitiative/php/checks/AvoidDoubleQuoteCheck.java
index 67e6a7c..d7674e7 100644
--- a/src/main/java/fr/greencodeinitiative/php/checks/AvoidDoubleQuoteCheck.java
+++ b/src/main/java/fr/greencodeinitiative/php/checks/AvoidDoubleQuoteCheck.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - PHP language - Provides rules to reduce the environmental footprint of your PHP programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.php.checks;
 
 import java.util.ArrayList;
diff --git a/src/main/java/fr/greencodeinitiative/php/checks/AvoidFullSQLRequestCheck.java b/src/main/java/fr/greencodeinitiative/php/checks/AvoidFullSQLRequestCheck.java
index 61c175d..c09cf5f 100644
--- a/src/main/java/fr/greencodeinitiative/php/checks/AvoidFullSQLRequestCheck.java
+++ b/src/main/java/fr/greencodeinitiative/php/checks/AvoidFullSQLRequestCheck.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - PHP language - Provides rules to reduce the environmental footprint of your PHP programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.php.checks;
 
 import java.util.Arrays;
diff --git a/src/main/java/fr/greencodeinitiative/php/checks/AvoidGettingSizeCollectionInLoopCheck.java b/src/main/java/fr/greencodeinitiative/php/checks/AvoidGettingSizeCollectionInLoopCheck.java
index de7fd17..b776b47 100644
--- a/src/main/java/fr/greencodeinitiative/php/checks/AvoidGettingSizeCollectionInLoopCheck.java
+++ b/src/main/java/fr/greencodeinitiative/php/checks/AvoidGettingSizeCollectionInLoopCheck.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - PHP language - Provides rules to reduce the environmental footprint of your PHP programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.php.checks;
 
 import org.sonar.check.Rule;
diff --git a/src/main/java/fr/greencodeinitiative/php/checks/AvoidMultipleIfElseStatementCheck.java b/src/main/java/fr/greencodeinitiative/php/checks/AvoidMultipleIfElseStatementCheck.java
index 5661853..8af8ea5 100644
--- a/src/main/java/fr/greencodeinitiative/php/checks/AvoidMultipleIfElseStatementCheck.java
+++ b/src/main/java/fr/greencodeinitiative/php/checks/AvoidMultipleIfElseStatementCheck.java
@@ -1,21 +1,19 @@
 /*
- * SonarQube PHP Custom Rules Example
- * Copyright (C) 2016-2016 SonarSource SA
- * mailto:contact AT sonarsource DOT com
+ * ecoCode - PHP language - Provides rules to reduce the environmental footprint of your PHP programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 3 of the License, or (at your option) any later version.
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 package fr.greencodeinitiative.php.checks;
 
diff --git a/src/main/java/fr/greencodeinitiative/php/checks/AvoidSQLRequestInLoopCheck.java b/src/main/java/fr/greencodeinitiative/php/checks/AvoidSQLRequestInLoopCheck.java
index 0badb8c..6cbfe1b 100644
--- a/src/main/java/fr/greencodeinitiative/php/checks/AvoidSQLRequestInLoopCheck.java
+++ b/src/main/java/fr/greencodeinitiative/php/checks/AvoidSQLRequestInLoopCheck.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - PHP language - Provides rules to reduce the environmental footprint of your PHP programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.php.checks;
 
 import java.util.Arrays;
diff --git a/src/main/java/fr/greencodeinitiative/php/checks/AvoidTryCatchFinallyCheck_NOK_failsAllTryStatements.java b/src/main/java/fr/greencodeinitiative/php/checks/AvoidTryCatchFinallyCheck_NOK_failsAllTryStatements.java
index 6aa9943..6cf0490 100644
--- a/src/main/java/fr/greencodeinitiative/php/checks/AvoidTryCatchFinallyCheck_NOK_failsAllTryStatements.java
+++ b/src/main/java/fr/greencodeinitiative/php/checks/AvoidTryCatchFinallyCheck_NOK_failsAllTryStatements.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - PHP language - Provides rules to reduce the environmental footprint of your PHP programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.php.checks;
 
 import java.util.Collections;
diff --git a/src/main/java/fr/greencodeinitiative/php/checks/AvoidUsingGlobalVariablesCheck.java b/src/main/java/fr/greencodeinitiative/php/checks/AvoidUsingGlobalVariablesCheck.java
index 1b37a96..8ddf657 100644
--- a/src/main/java/fr/greencodeinitiative/php/checks/AvoidUsingGlobalVariablesCheck.java
+++ b/src/main/java/fr/greencodeinitiative/php/checks/AvoidUsingGlobalVariablesCheck.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - PHP language - Provides rules to reduce the environmental footprint of your PHP programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.php.checks;
 
 import java.util.regex.Pattern;
diff --git a/src/main/java/fr/greencodeinitiative/php/checks/IncrementCheck.java b/src/main/java/fr/greencodeinitiative/php/checks/IncrementCheck.java
index 904cd40..85efefe 100644
--- a/src/main/java/fr/greencodeinitiative/php/checks/IncrementCheck.java
+++ b/src/main/java/fr/greencodeinitiative/php/checks/IncrementCheck.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - PHP language - Provides rules to reduce the environmental footprint of your PHP programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.php.checks;
 
 import java.util.Collections;
diff --git a/src/main/java/fr/greencodeinitiative/php/checks/NoFunctionCallWhenDeclaringForLoop.java b/src/main/java/fr/greencodeinitiative/php/checks/NoFunctionCallWhenDeclaringForLoop.java
index 999d0cf..de9889b 100644
--- a/src/main/java/fr/greencodeinitiative/php/checks/NoFunctionCallWhenDeclaringForLoop.java
+++ b/src/main/java/fr/greencodeinitiative/php/checks/NoFunctionCallWhenDeclaringForLoop.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - PHP language - Provides rules to reduce the environmental footprint of your PHP programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.php.checks;
 
 import java.util.Collections;
diff --git a/src/main/java/fr/greencodeinitiative/php/checks/UseOfMethodsForBasicOperations.java b/src/main/java/fr/greencodeinitiative/php/checks/UseOfMethodsForBasicOperations.java
index 1285fb4..23223f5 100644
--- a/src/main/java/fr/greencodeinitiative/php/checks/UseOfMethodsForBasicOperations.java
+++ b/src/main/java/fr/greencodeinitiative/php/checks/UseOfMethodsForBasicOperations.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - PHP language - Provides rules to reduce the environmental footprint of your PHP programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.php.checks;
 
 import java.util.ArrayList;
diff --git a/src/test/java/fr/greencodeinitiative/php/PhpPluginTest.java b/src/test/java/fr/greencodeinitiative/php/PhpPluginTest.java
index 9139c7c..7f25c2a 100644
--- a/src/test/java/fr/greencodeinitiative/php/PhpPluginTest.java
+++ b/src/test/java/fr/greencodeinitiative/php/PhpPluginTest.java
@@ -1,15 +1,16 @@
 /*
- * Copyright (C) 2023 Green Code Initiative
+ * ecoCode - PHP language - Provides rules to reduce the environmental footprint of your PHP programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 3 of the License, or (at your option) any later version.
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
diff --git a/src/test/java/fr/greencodeinitiative/php/PhpRuleRepositoryTest.java b/src/test/java/fr/greencodeinitiative/php/PhpRuleRepositoryTest.java
index e64c7e5..c6a2ffb 100644
--- a/src/test/java/fr/greencodeinitiative/php/PhpRuleRepositoryTest.java
+++ b/src/test/java/fr/greencodeinitiative/php/PhpRuleRepositoryTest.java
@@ -1,15 +1,16 @@
 /*
- * Copyright (C) 2023 Green Code Initiative
+ * ecoCode - PHP language - Provides rules to reduce the environmental footprint of your PHP programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 3 of the License, or (at your option) any later version.
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
diff --git a/src/test/java/fr/greencodeinitiative/php/checks/AvoidDoubleQuoteCheckTest.java b/src/test/java/fr/greencodeinitiative/php/checks/AvoidDoubleQuoteCheckTest.java
index 9a68f8a..1c20056 100644
--- a/src/test/java/fr/greencodeinitiative/php/checks/AvoidDoubleQuoteCheckTest.java
+++ b/src/test/java/fr/greencodeinitiative/php/checks/AvoidDoubleQuoteCheckTest.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - PHP language - Provides rules to reduce the environmental footprint of your PHP programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.php.checks;
 
 import java.io.File;
diff --git a/src/test/java/fr/greencodeinitiative/php/checks/AvoidFullSQLRequestCheckTest.java b/src/test/java/fr/greencodeinitiative/php/checks/AvoidFullSQLRequestCheckTest.java
index de90bec..52ed025 100644
--- a/src/test/java/fr/greencodeinitiative/php/checks/AvoidFullSQLRequestCheckTest.java
+++ b/src/test/java/fr/greencodeinitiative/php/checks/AvoidFullSQLRequestCheckTest.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - PHP language - Provides rules to reduce the environmental footprint of your PHP programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.php.checks;
 
 import java.io.File;
diff --git a/src/test/java/fr/greencodeinitiative/php/checks/AvoidGettingSizeCollectionInLoopTest.java b/src/test/java/fr/greencodeinitiative/php/checks/AvoidGettingSizeCollectionInLoopTest.java
index 85de2bd..29ee090 100644
--- a/src/test/java/fr/greencodeinitiative/php/checks/AvoidGettingSizeCollectionInLoopTest.java
+++ b/src/test/java/fr/greencodeinitiative/php/checks/AvoidGettingSizeCollectionInLoopTest.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - PHP language - Provides rules to reduce the environmental footprint of your PHP programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.php.checks;
 
 import org.junit.Test;
diff --git a/src/test/java/fr/greencodeinitiative/php/checks/AvoidMultipleIfElseStatementCheckTest.java b/src/test/java/fr/greencodeinitiative/php/checks/AvoidMultipleIfElseStatementCheckTest.java
index 50b6bfb..62228a3 100644
--- a/src/test/java/fr/greencodeinitiative/php/checks/AvoidMultipleIfElseStatementCheckTest.java
+++ b/src/test/java/fr/greencodeinitiative/php/checks/AvoidMultipleIfElseStatementCheckTest.java
@@ -1,21 +1,19 @@
 /*
- * SonarQube PHP Custom Rules Example
- * Copyright (C) 2016-2016 SonarSource SA
- * mailto:contact AT sonarsource DOT com
+ * ecoCode - PHP language - Provides rules to reduce the environmental footprint of your PHP programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 3 of the License, or (at your option) any later version.
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 package fr.greencodeinitiative.php.checks;
 
diff --git a/src/test/java/fr/greencodeinitiative/php/checks/AvoidSQLRequestInLoopCheckTest.java b/src/test/java/fr/greencodeinitiative/php/checks/AvoidSQLRequestInLoopCheckTest.java
index e124b85..7d8b22e 100644
--- a/src/test/java/fr/greencodeinitiative/php/checks/AvoidSQLRequestInLoopCheckTest.java
+++ b/src/test/java/fr/greencodeinitiative/php/checks/AvoidSQLRequestInLoopCheckTest.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - PHP language - Provides rules to reduce the environmental footprint of your PHP programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.php.checks;
 
 import java.io.File;
diff --git a/src/test/java/fr/greencodeinitiative/php/checks/AvoidTryCatchFinallyCheckNOKfailsAllTryStatementsTest.java b/src/test/java/fr/greencodeinitiative/php/checks/AvoidTryCatchFinallyCheckNOKfailsAllTryStatementsTest.java
index d9867e9..f4d2bb0 100644
--- a/src/test/java/fr/greencodeinitiative/php/checks/AvoidTryCatchFinallyCheckNOKfailsAllTryStatementsTest.java
+++ b/src/test/java/fr/greencodeinitiative/php/checks/AvoidTryCatchFinallyCheckNOKfailsAllTryStatementsTest.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - PHP language - Provides rules to reduce the environmental footprint of your PHP programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.php.checks;
 
 import java.io.File;
diff --git a/src/test/java/fr/greencodeinitiative/php/checks/AvoidUsingGlobalVariablesCheckTest.java b/src/test/java/fr/greencodeinitiative/php/checks/AvoidUsingGlobalVariablesCheckTest.java
index ca02561..b9ed4a6 100644
--- a/src/test/java/fr/greencodeinitiative/php/checks/AvoidUsingGlobalVariablesCheckTest.java
+++ b/src/test/java/fr/greencodeinitiative/php/checks/AvoidUsingGlobalVariablesCheckTest.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - PHP language - Provides rules to reduce the environmental footprint of your PHP programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.php.checks;
 
 import org.junit.Test;
diff --git a/src/test/java/fr/greencodeinitiative/php/checks/IncrementCheckTest.java b/src/test/java/fr/greencodeinitiative/php/checks/IncrementCheckTest.java
index 7da3216..df03d9b 100644
--- a/src/test/java/fr/greencodeinitiative/php/checks/IncrementCheckTest.java
+++ b/src/test/java/fr/greencodeinitiative/php/checks/IncrementCheckTest.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - PHP language - Provides rules to reduce the environmental footprint of your PHP programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.php.checks;
 
 import java.io.File;
diff --git a/src/test/java/fr/greencodeinitiative/php/checks/NoFunctionCallWhenDeclaringForLoopTest.java b/src/test/java/fr/greencodeinitiative/php/checks/NoFunctionCallWhenDeclaringForLoopTest.java
index 2d18b06..0ee0bf9 100644
--- a/src/test/java/fr/greencodeinitiative/php/checks/NoFunctionCallWhenDeclaringForLoopTest.java
+++ b/src/test/java/fr/greencodeinitiative/php/checks/NoFunctionCallWhenDeclaringForLoopTest.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - PHP language - Provides rules to reduce the environmental footprint of your PHP programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.php.checks;
 
 import java.io.File;
diff --git a/src/test/java/fr/greencodeinitiative/php/checks/UseOfMethodsForBasicOperationsTest.java b/src/test/java/fr/greencodeinitiative/php/checks/UseOfMethodsForBasicOperationsTest.java
index 1627d94..dfe17a9 100644
--- a/src/test/java/fr/greencodeinitiative/php/checks/UseOfMethodsForBasicOperationsTest.java
+++ b/src/test/java/fr/greencodeinitiative/php/checks/UseOfMethodsForBasicOperationsTest.java
@@ -1,3 +1,20 @@
+/*
+ * ecoCode - PHP language - Provides rules to reduce the environmental footprint of your PHP programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
 package fr.greencodeinitiative.php.checks;
 
 import java.io.File;