Refactored the OpenFlow controller package name-space and fixed a number of Javadoc warnings.
diff --git a/of/ctl/src/main/java/org/onlab/onos/of/controller/impl/internal/SwitchDriverSubHandshakeCompleted.java b/of/ctl/src/main/java/org/onlab/onos/of/controller/impl/internal/SwitchDriverSubHandshakeCompleted.java
new file mode 100644
index 0000000..ba792e5
--- /dev/null
+++ b/of/ctl/src/main/java/org/onlab/onos/of/controller/impl/internal/SwitchDriverSubHandshakeCompleted.java
@@ -0,0 +1,19 @@
+package org.onlab.onos.of.controller.impl.internal;
+
+import org.projectfloodlight.openflow.protocol.OFMessage;
+
+
+/**
+ * Indicates that a message was passed to a switch driver's subhandshake
+ * handling code but the driver has already completed the sub-handshake.
+ *
+ */
+public class SwitchDriverSubHandshakeCompleted
+        extends SwitchDriverSubHandshakeException {
+    private static final long serialVersionUID = -8817822245846375995L;
+
+    public SwitchDriverSubHandshakeCompleted(OFMessage m) {
+        super("Sub-Handshake is already complete but received message "
+              + m.getType());
+    }
+}