Organized imports for main classes

Change-Id: I3b05d7f289706aef04019a820be9989f8fb54945
diff --git a/src/main/java/net/onrc/onos/core/packet/Ethernet.java b/src/main/java/net/onrc/onos/core/packet/Ethernet.java
index be37380..794b3b7 100644
--- a/src/main/java/net/onrc/onos/core/packet/Ethernet.java
+++ b/src/main/java/net/onrc/onos/core/packet/Ethernet.java
@@ -23,6 +23,7 @@
 import java.util.Map;
 
 import net.floodlightcontroller.util.MACAddress;
+
 import org.openflow.util.HexString;
 
 /**