Adding package.html javadocs for the OF controller code.
diff --git a/of/api/src/main/java/org/onlab/onos/of/controller/PacketListener.java b/of/api/src/main/java/org/onlab/onos/of/controller/PacketListener.java
index 5c6d73f..a14f9e1 100644
--- a/of/api/src/main/java/org/onlab/onos/of/controller/PacketListener.java
+++ b/of/api/src/main/java/org/onlab/onos/of/controller/PacketListener.java
@@ -6,8 +6,9 @@
 public interface PacketListener {
 
     /**
-     * Handle the packet.
-     * @param pktCtx the packet context ({@link }
+     * Handles the packet.
+     *
+     * @param pktCtx the packet context
      */
     public void handlePacket(PacketContext pktCtx);
 }