diff --git a/src/main/java/net/onrc/onos/ofcontroller/networkgraph/DeviceEvent.java b/src/main/java/net/onrc/onos/ofcontroller/networkgraph/DeviceEvent.java
index 628b9d4..8bea7f8 100644
--- a/src/main/java/net/onrc/onos/ofcontroller/networkgraph/DeviceEvent.java
+++ b/src/main/java/net/onrc/onos/ofcontroller/networkgraph/DeviceEvent.java
@@ -30,8 +30,9 @@
 
 
     /**
-     * Default constructor.
+     * Default constructor for Serializer to use.
      */
+    @Deprecated
     public DeviceEvent() {
 	mac = null;
     }
diff --git a/src/main/java/net/onrc/onos/ofcontroller/networkgraph/LinkEvent.java b/src/main/java/net/onrc/onos/ofcontroller/networkgraph/LinkEvent.java
index 5fd3b82..03c1a43 100644
--- a/src/main/java/net/onrc/onos/ofcontroller/networkgraph/LinkEvent.java
+++ b/src/main/java/net/onrc/onos/ofcontroller/networkgraph/LinkEvent.java
@@ -15,8 +15,9 @@
     protected final SwitchPort dst;
 
     /**
-     * Default constructor.
+     * Default constructor for Serializer to use.
      */
+    @Deprecated
     public LinkEvent() {
 	src = null;
 	dst = null;
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;
     }
diff --git a/src/main/java/net/onrc/onos/ofcontroller/networkgraph/SwitchEvent.java b/src/main/java/net/onrc/onos/ofcontroller/networkgraph/SwitchEvent.java
index 84b9360..f483e77 100644
--- a/src/main/java/net/onrc/onos/ofcontroller/networkgraph/SwitchEvent.java
+++ b/src/main/java/net/onrc/onos/ofcontroller/networkgraph/SwitchEvent.java
@@ -12,8 +12,9 @@
     protected final Long dpid;
 
     /**
-     * Default constructor.
+     * Default constructor for Serializer to use.
      */
+    @Deprecated
     public SwitchEvent() {
 	dpid = null;
     }