diff --git a/hollow/src/test/java/com/netflix/hollow/core/write/objectmapper/DirectCircularReference.java b/hollow/src/test/java/com/netflix/hollow/core/write/objectmapper/DirectCircularReference.java
index 32032bf1c7..42488b128c 100644
--- a/hollow/src/test/java/com/netflix/hollow/core/write/objectmapper/DirectCircularReference.java
+++ b/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;
diff --git a/hollow/src/test/java/com/netflix/hollow/core/write/objectmapper/DirectListCircularReference.java b/hollow/src/test/java/com/netflix/hollow/core/write/objectmapper/DirectListCircularReference.java
index a47b49e73f..3e617fef8a 100644
--- a/hollow/src/test/java/com/netflix/hollow/core/write/objectmapper/DirectListCircularReference.java
+++ b/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;
diff --git a/hollow/src/test/java/com/netflix/hollow/core/write/objectmapper/DirectMapCircularReference.java b/hollow/src/test/java/com/netflix/hollow/core/write/objectmapper/DirectMapCircularReference.java
index 4111be23c7..b715bf33de 100644
--- a/hollow/src/test/java/com/netflix/hollow/core/write/objectmapper/DirectMapCircularReference.java
+++ b/hollow/src/test/java/com/netflix/hollow/core/write/objectmapper/DirectMapCircularReference.java
@@ -1,3 +1,20 @@
+/*
+ *
+ *  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;
@@ -5,6 +22,7 @@
 /**
  * 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;
diff --git a/hollow/src/test/java/com/netflix/hollow/core/write/objectmapper/DirectSetCircularReference.java b/hollow/src/test/java/com/netflix/hollow/core/write/objectmapper/DirectSetCircularReference.java
index c6821e022c..e7d6898a8e 100644
--- a/hollow/src/test/java/com/netflix/hollow/core/write/objectmapper/DirectSetCircularReference.java
+++ b/hollow/src/test/java/com/netflix/hollow/core/write/objectmapper/DirectSetCircularReference.java
@@ -1,3 +1,20 @@
+/*
+ *
+ *  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;
@@ -5,6 +22,7 @@
 /**
  * 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;
diff --git a/hollow/src/test/java/com/netflix/hollow/core/write/objectmapper/IndirectCircularReference.java b/hollow/src/test/java/com/netflix/hollow/core/write/objectmapper/IndirectCircularReference.java
index 1608c7aa41..474fc5d290 100644
--- a/hollow/src/test/java/com/netflix/hollow/core/write/objectmapper/IndirectCircularReference.java
+++ b/hollow/src/test/java/com/netflix/hollow/core/write/objectmapper/IndirectCircularReference.java
@@ -1,3 +1,20 @@
+/*
+ *
+ *  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;
 
 /**
@@ -5,6 +22,7 @@
  *
  * E depends on F, F depends on G, and G depends back on E
  */
+@SuppressWarnings("unused")
 public class IndirectCircularReference {
 
     class TypeE {