Merge pull request #524 from ajkannan/make-resourcemanagerimpl-package-protected

Make ResourceManagerImpl package protected

Author: aozarov

gcloud-java-resourcemanager/src/main/java/com/google/gcloud/resourcemanager/ResourceManagerImpl.java

@@ -37,7 +37,7 @@
 import java.util.Map;
 import java.util.concurrent.Callable;
 
-public class ResourceManagerImpl
+final class ResourceManagerImpl
     extends BaseService<ResourceManagerOptions> implements ResourceManager {
 
   private static final Interceptor EXCEPTION_HANDLER_INTERCEPTOR = new Interceptor() {