Add a missing comment.
diff --git a/src/main/java/net/onrc/onos/ofcontroller/util/Switch.java b/src/main/java/net/onrc/onos/ofcontroller/util/Switch.java
index c989732..f7df223 100644
--- a/src/main/java/net/onrc/onos/ofcontroller/util/Switch.java
+++ b/src/main/java/net/onrc/onos/ofcontroller/util/Switch.java
@@ -7,6 +7,9 @@
  * NOTE: Currently this class is (almost) not used.
  */
 public class Switch {
+    /**
+     * The Switch state.
+     */
     public enum SwitchState {
 	INACTIVE,
 	ACTIVE,