Revised copyright message.
diff --git a/core/api/src/main/java/org/onlab/onos/event/AbstractEvent.java b/core/api/src/main/java/org/onlab/onos/event/AbstractEvent.java
index f5c9691..cc4735d 100644
--- a/core/api/src/main/java/org/onlab/onos/event/AbstractEvent.java
+++ b/core/api/src/main/java/org/onlab/onos/event/AbstractEvent.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2014 Open Networking Laboratory
+ *
+ * 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 org.onlab.onos.event;
 
 import static com.google.common.base.MoreObjects.toStringHelper;
diff --git a/core/api/src/main/java/org/onlab/onos/event/AbstractEventAccumulator.java b/core/api/src/main/java/org/onlab/onos/event/AbstractEventAccumulator.java
index c5bfa23..f866633 100644
--- a/core/api/src/main/java/org/onlab/onos/event/AbstractEventAccumulator.java
+++ b/core/api/src/main/java/org/onlab/onos/event/AbstractEventAccumulator.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2014 Open Networking Laboratory
+ *
+ * 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 org.onlab.onos.event;
 
 import com.google.common.collect.Lists;
diff --git a/core/api/src/main/java/org/onlab/onos/event/AbstractListenerRegistry.java b/core/api/src/main/java/org/onlab/onos/event/AbstractListenerRegistry.java
index 95581e3..d9e6484 100644
--- a/core/api/src/main/java/org/onlab/onos/event/AbstractListenerRegistry.java
+++ b/core/api/src/main/java/org/onlab/onos/event/AbstractListenerRegistry.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2014 Open Networking Laboratory
+ *
+ * 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 org.onlab.onos.event;
 
 import org.slf4j.Logger;
diff --git a/core/api/src/main/java/org/onlab/onos/event/DefaultEventSinkRegistry.java b/core/api/src/main/java/org/onlab/onos/event/DefaultEventSinkRegistry.java
index 1c7fb13..7f99e7a 100644
--- a/core/api/src/main/java/org/onlab/onos/event/DefaultEventSinkRegistry.java
+++ b/core/api/src/main/java/org/onlab/onos/event/DefaultEventSinkRegistry.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2014 Open Networking Laboratory
+ *
+ * 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 org.onlab.onos.event;
 
 import com.google.common.collect.ImmutableSet;
diff --git a/core/api/src/main/java/org/onlab/onos/event/Event.java b/core/api/src/main/java/org/onlab/onos/event/Event.java
index baefa67..fe1f2bf 100644
--- a/core/api/src/main/java/org/onlab/onos/event/Event.java
+++ b/core/api/src/main/java/org/onlab/onos/event/Event.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2014 Open Networking Laboratory
+ *
+ * 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 org.onlab.onos.event;
 
 /**
diff --git a/core/api/src/main/java/org/onlab/onos/event/EventAccumulator.java b/core/api/src/main/java/org/onlab/onos/event/EventAccumulator.java
index e556afb..2d4384e 100644
--- a/core/api/src/main/java/org/onlab/onos/event/EventAccumulator.java
+++ b/core/api/src/main/java/org/onlab/onos/event/EventAccumulator.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2014 Open Networking Laboratory
+ *
+ * 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 org.onlab.onos.event;
 
 import java.util.List;
diff --git a/core/api/src/main/java/org/onlab/onos/event/EventDeliveryService.java b/core/api/src/main/java/org/onlab/onos/event/EventDeliveryService.java
index 4b7a52d..2e5b8ed 100644
--- a/core/api/src/main/java/org/onlab/onos/event/EventDeliveryService.java
+++ b/core/api/src/main/java/org/onlab/onos/event/EventDeliveryService.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2014 Open Networking Laboratory
+ *
+ * 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 org.onlab.onos.event;
 
 /**
diff --git a/core/api/src/main/java/org/onlab/onos/event/EventDispatcher.java b/core/api/src/main/java/org/onlab/onos/event/EventDispatcher.java
index 847df88..c1155d3 100644
--- a/core/api/src/main/java/org/onlab/onos/event/EventDispatcher.java
+++ b/core/api/src/main/java/org/onlab/onos/event/EventDispatcher.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2014 Open Networking Laboratory
+ *
+ * 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 org.onlab.onos.event;
 
 /**
diff --git a/core/api/src/main/java/org/onlab/onos/event/EventListener.java b/core/api/src/main/java/org/onlab/onos/event/EventListener.java
index 1e0d7e6..0504b29 100644
--- a/core/api/src/main/java/org/onlab/onos/event/EventListener.java
+++ b/core/api/src/main/java/org/onlab/onos/event/EventListener.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2014 Open Networking Laboratory
+ *
+ * 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 org.onlab.onos.event;
 
 /**
diff --git a/core/api/src/main/java/org/onlab/onos/event/EventSink.java b/core/api/src/main/java/org/onlab/onos/event/EventSink.java
index 45ad408..5f2f50e 100644
--- a/core/api/src/main/java/org/onlab/onos/event/EventSink.java
+++ b/core/api/src/main/java/org/onlab/onos/event/EventSink.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2014 Open Networking Laboratory
+ *
+ * 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 org.onlab.onos.event;
 
 /**
diff --git a/core/api/src/main/java/org/onlab/onos/event/EventSinkRegistry.java b/core/api/src/main/java/org/onlab/onos/event/EventSinkRegistry.java
index 7398de7..40c720a 100644
--- a/core/api/src/main/java/org/onlab/onos/event/EventSinkRegistry.java
+++ b/core/api/src/main/java/org/onlab/onos/event/EventSinkRegistry.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2014 Open Networking Laboratory
+ *
+ * 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 org.onlab.onos.event;
 
 import java.util.Set;
diff --git a/core/api/src/main/java/org/onlab/onos/event/package-info.java b/core/api/src/main/java/org/onlab/onos/event/package-info.java
index e2a82f6..8f6fd67 100644
--- a/core/api/src/main/java/org/onlab/onos/event/package-info.java
+++ b/core/api/src/main/java/org/onlab/onos/event/package-info.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2014 Open Networking Laboratory
+ *
+ * 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.
+ */
+
 /**
  * Local event delivery subsystem interfaces & supporting abstractions.
  */