diff --git a/core/src/main/scala/kafka/server/FetcherEventManager.scala b/core/src/main/scala/kafka/server/FetcherEventManager.scala
index d83e506857857..f794f284e3b7a 100644
--- a/core/src/main/scala/kafka/server/FetcherEventManager.scala
+++ b/core/src/main/scala/kafka/server/FetcherEventManager.scala
@@ -1,3 +1,20 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 kafka.server
 
 
diff --git a/core/src/main/scala/kafka/server/FetcherState.scala b/core/src/main/scala/kafka/server/FetcherState.scala
index 21dd0c43a0fec..d26911b9205f0 100644
--- a/core/src/main/scala/kafka/server/FetcherState.scala
+++ b/core/src/main/scala/kafka/server/FetcherState.scala
@@ -1,3 +1,20 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 kafka.server
 
 sealed abstract class FetcherState {
diff --git a/core/src/test/scala/integration/kafka/server/FetcherEventManagerTest.scala b/core/src/test/scala/integration/kafka/server/FetcherEventManagerTest.scala
index 2ba7b7511d92e..b2d46ecd1435b 100644
--- a/core/src/test/scala/integration/kafka/server/FetcherEventManagerTest.scala
+++ b/core/src/test/scala/integration/kafka/server/FetcherEventManagerTest.scala
@@ -1,3 +1,20 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 integration.kafka.server
 
 import kafka.cluster.BrokerEndPoint
diff --git a/core/src/test/scala/unit/kafka/server/FetcherEventBusTest.scala b/core/src/test/scala/unit/kafka/server/FetcherEventBusTest.scala
index 62d00204989e9..c6dd3f014d486 100644
--- a/core/src/test/scala/unit/kafka/server/FetcherEventBusTest.scala
+++ b/core/src/test/scala/unit/kafka/server/FetcherEventBusTest.scala
@@ -1,3 +1,20 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 unit.kafka.server
 
 import java.util.Date