Implement DeviceImpl and Path class, and minor change

Change-Id: I666d6d7e00620220048c5f8031a7c7c149ec89cd
diff --git a/src/main/java/net/onrc/onos/ofcontroller/networkgraph/FloodlightToOnosMappers.java b/src/main/java/net/onrc/onos/ofcontroller/networkgraph/FloodlightToOnosMappers.java
index ebff81d..dbf8750 100644
--- a/src/main/java/net/onrc/onos/ofcontroller/networkgraph/FloodlightToOnosMappers.java
+++ b/src/main/java/net/onrc/onos/ofcontroller/networkgraph/FloodlightToOnosMappers.java
@@ -17,7 +17,7 @@
 	}
 
 	public static Port map(NetworkGraph graph, SwitchImpl sw, OFPhysicalPort port) {
-		PortImpl onosPort = new PortImpl(graph, sw, new Long(port.getPortNumber()));
+		PortImpl onosPort = new PortImpl(graph, sw, Long.valueOf(port.getPortNumber()));
 		onosPort.setDescription(port.getName());
 		return onosPort;
 	}