Add server capabilities, refactor observer pattern
diff --git a/src/main/java/com/intel/jndn/utils/OnEvent.java b/src/main/java/com/intel/jndn/utils/OnEvent.java
index e9c7f67..62bdd56 100644
--- a/src/main/java/com/intel/jndn/utils/OnEvent.java
+++ b/src/main/java/com/intel/jndn/utils/OnEvent.java
@@ -16,5 +16,5 @@
  * @author Andrew Brown <andrew.brown@intel.com>
  */
 public interface OnEvent {
-  public void onEvent(ClientEvent event);
+  public void onEvent(NDNEvent event);
 }