Mark constructors provided for Serializers, deprecated

Change-Id: Ia9f363d4df811c296ebc24e0624fc0e08bab1aa8
diff --git a/src/main/java/net/onrc/onos/ofcontroller/networkgraph/PortEvent.java b/src/main/java/net/onrc/onos/ofcontroller/networkgraph/PortEvent.java
index 4bd3ea1..801bc1c 100644
--- a/src/main/java/net/onrc/onos/ofcontroller/networkgraph/PortEvent.java
+++ b/src/main/java/net/onrc/onos/ofcontroller/networkgraph/PortEvent.java
@@ -14,8 +14,9 @@
 	public final Long number;
 
 	/**
-	 * Default constructor.
+	 * Default constructor for Serializer to use.
 	 */
+	@Deprecated
 	public SwitchPort() {
 	    dpid = null;
 	    number = null;
@@ -77,8 +78,9 @@
     // TODO Add Description
 
     /**
-     * Default constructor.
+     * Default constructor for Serializer to use.
      */
+    @Deprecated
     public PortEvent() {
 	id = null;
     }