Addressed some checkstyle, PMD and findbugs violations in the ARP module

Change-Id: I194533ba5f96a7631ea662a93cbcbd8a2c84dea9
diff --git a/src/main/java/net/onrc/onos/ofcontroller/proxyarp/IPacketOutEventHandler.java b/src/main/java/net/onrc/onos/ofcontroller/proxyarp/IPacketOutEventHandler.java
index 86b3728..ce98703 100644
--- a/src/main/java/net/onrc/onos/ofcontroller/proxyarp/IPacketOutEventHandler.java
+++ b/src/main/java/net/onrc/onos/ofcontroller/proxyarp/IPacketOutEventHandler.java
@@ -1,18 +1,20 @@
 package net.onrc.onos.ofcontroller.proxyarp;
 
 /**
- * Classes may implement this interface if they wish to subscribe to 
- * packet out notifications from the datagrid service. Packet out notifications
- * are used to direct other ONOS instances to send packets out particular
- * ports under their control.
+ * Classes may implement this interface if they wish to subscribe to packet out
+ * notifications from the datagrid service. Packet out notifications are used to
+ * direct other ONOS instances to send packets out particular ports under their
+ * control.
  *
  */
 public interface IPacketOutEventHandler {
 
-	/**
-	 * Notify the packet out event handler that an packet out notification has
-	 * been received.
-	 * @param packetOutNotification An object describing the notification
-	 */
-	public void packetOutNotification(PacketOutNotification packetOutNotification);
+    /**
+     * Notify the packet out event handler that an packet out notification has
+     * been received.
+     *
+     * @param packetOutNotification An object describing the notification
+     */
+    public void packetOutNotification(
+            PacketOutNotification packetOutNotification);
 }