Organized imports for main classes

Change-Id: I3b05d7f289706aef04019a820be9989f8fb54945
diff --git a/src/main/java/org/openflow/protocol/OFVendor.java b/src/main/java/org/openflow/protocol/OFVendor.java
index 8ecb862..0178c18 100644
--- a/src/main/java/org/openflow/protocol/OFVendor.java
+++ b/src/main/java/org/openflow/protocol/OFVendor.java
@@ -18,10 +18,10 @@
 package org.openflow.protocol;
 
 import org.jboss.netty.buffer.ChannelBuffer;
-import org.openflow.util.U16;
 import org.openflow.protocol.factory.OFVendorDataFactory;
 import org.openflow.protocol.factory.OFVendorDataFactoryAware;
 import org.openflow.protocol.vendor.OFVendorData;
+import org.openflow.util.U16;
 
 /**
  * Represents ofp_vendor_header