Added more event and listener interface definitions.
diff --git a/net/api/src/main/java/org/onlab/onos/net/device/DeviceListener.java b/net/api/src/main/java/org/onlab/onos/net/device/DeviceListener.java
index 232fc95..b11d617 100644
--- a/net/api/src/main/java/org/onlab/onos/net/device/DeviceListener.java
+++ b/net/api/src/main/java/org/onlab/onos/net/device/DeviceListener.java
@@ -1,7 +1,9 @@
package org.onlab.onos.net.device;
+import org.onlab.onos.event.EventListener;
+
/**
- * Entity capable of receiving device related events.
+ * Entity capable of receiving infrastructure device related events.
*/
-public interface DeviceListener {
+public interface DeviceListener extends EventListener<DeviceEvent> {
}