add/update license headers
diff --git a/asterix-events/src/main/resources/events/events.xml b/asterix-events/src/main/resources/events/events.xml
index f85e3ea1..a396067 100644
--- a/asterix-events/src/main/resources/events/events.xml
+++ b/asterix-events/src/main/resources/events/events.xml
@@ -1,3 +1,17 @@
+<!--
+ ! Copyright 2009-2013 by The Regents of the University of California
+ ! 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 from
+ !
+ ! 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.
+ !-->
<events xmlns="events">
<event>
<type>node_join</type>