Minor touch-up and added missing license headers

hollow/src/test/java/com/netflix/hollow/core/write/objectmapper/DirectCircularReference.java

@@ -1,9 +1,27 @@
+/*
+ *
+ *  Copyright 2017 Netflix, Inc.
+ *
+ *     Licensed under the Apache License, Version 2.0 (the "License");
+ *     you may not use this file except in compliance with the License.
+ *     You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *     Unless required by applicable law or agreed to in writing, software
+ *     distributed under the License is distributed on an "AS IS" BASIS,
+ *     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *     See the License for the specific language governing permissions and
+ *     limitations under the License.
+ *
+ */
 package com.netflix.hollow.core.write.objectmapper;
 
 
 /**
  * Sample type that represents a direct circular reference between 2 classes.
  */
+@SuppressWarnings("unused")
 public class DirectCircularReference {
 
     private final String name;

hollow/src/test/java/com/netflix/hollow/core/write/objectmapper/DirectListCircularReference.java

@@ -1,11 +1,28 @@
+/*
+ *
+ *  Copyright 2017 Netflix, Inc.
+ *
+ *     Licensed under the Apache License, Version 2.0 (the "License");
+ *     you may not use this file except in compliance with the License.
+ *     You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *     Unless required by applicable law or agreed to in writing, software
+ *     distributed under the License is distributed on an "AS IS" BASIS,
+ *     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *     See the License for the specific language governing permissions and
+ *     limitations under the License.
+ *
+ */
 package com.netflix.hollow.core.write.objectmapper;
 
-import java.util.Collections;
 import java.util.List;
 
 /**
  * Sample type that represents a direct circular reference between 2 classes, with a List containing the child.
  */
+@SuppressWarnings("unused")
 public class DirectListCircularReference {
 
     private final String name;

hollow/src/test/java/com/netflix/hollow/core/write/objectmapper/DirectMapCircularReference.java

@@ -1,10 +1,28 @@
+/*
+ *
+ *  Copyright 2017 Netflix, Inc.
+ *
+ *     Licensed under the Apache License, Version 2.0 (the "License");
+ *     you may not use this file except in compliance with the License.
+ *     You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *     Unless required by applicable law or agreed to in writing, software
+ *     distributed under the License is distributed on an "AS IS" BASIS,
+ *     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *     See the License for the specific language governing permissions and
+ *     limitations under the License.
+ *
+ */
 package com.netflix.hollow.core.write.objectmapper;
 
 import java.util.Map;
 
 /**
  * Sample type that represents a direct circular reference between 2 classes, with a Map containing the child.
  */
+@SuppressWarnings("unused")
 public class DirectMapCircularReference {
 
     private final String name;

hollow/src/test/java/com/netflix/hollow/core/write/objectmapper/DirectSetCircularReference.java

@@ -1,10 +1,28 @@
+/*
+ *
+ *  Copyright 2017 Netflix, Inc.
+ *
+ *     Licensed under the Apache License, Version 2.0 (the "License");
+ *     you may not use this file except in compliance with the License.
+ *     You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *     Unless required by applicable law or agreed to in writing, software
+ *     distributed under the License is distributed on an "AS IS" BASIS,
+ *     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *     See the License for the specific language governing permissions and
+ *     limitations under the License.
+ *
+ */
 package com.netflix.hollow.core.write.objectmapper;
 
 import java.util.Set;
 
 /**
  * Sample type that represents a direct circular reference between 2 classes, with a Set containing the child.
  */
+@SuppressWarnings("unused")
 public class DirectSetCircularReference {
 
     private final String name;

hollow/src/test/java/com/netflix/hollow/core/write/objectmapper/IndirectCircularReference.java

@@ -1,10 +1,28 @@
+/*
+ *
+ *  Copyright 2017 Netflix, Inc.
+ *
+ *     Licensed under the Apache License, Version 2.0 (the "License");
+ *     you may not use this file except in compliance with the License.
+ *     You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *     Unless required by applicable law or agreed to in writing, software
+ *     distributed under the License is distributed on an "AS IS" BASIS,
+ *     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *     See the License for the specific language governing permissions and
+ *     limitations under the License.
+ *
+ */
 package com.netflix.hollow.core.write.objectmapper;
 
 /**
  * Object model representing an indirect or nested circular reference:
  *
  * E depends on F, F depends on G, and G depends back on E
  */
+@SuppressWarnings("unused")
 public class IndirectCircularReference {
 
     class TypeE {