diff --git a/src/main/java/net/onrc/onos/core/topology/PortImpl.java b/src/main/java/net/onrc/onos/core/topology/PortImpl.java
index cd7d82b..32646d0 100644
--- a/src/main/java/net/onrc/onos/core/topology/PortImpl.java
+++ b/src/main/java/net/onrc/onos/core/topology/PortImpl.java
@@ -6,108 +6,106 @@
 
 /**
  * Port Object stored in In-memory Topology.
- *
+ * <p/>
  * TODO REMOVE following design memo: This object itself may hold the DBObject,
  * but this Object itself will not issue any read/write to the DataStore.
  */
 public class PortImpl extends NetworkGraphObject implements Port {
 
-	private Switch sw;
+    private Switch sw;
 
-	private Long number;
-	private String description;
+    private Long number;
+    private String description;
 
-	protected Link outgoingLink;
-	protected Link incomingLink;
-	// These needs to be ConcurrentCollecton if allowing Graph to be accessed Concurrently
-	protected Set<Device> devices;
+    protected Link outgoingLink;
+    protected Link incomingLink;
+    // These needs to be ConcurrentCollecton if allowing Graph to be accessed Concurrently
+    protected Set<Device> devices;
 
-	public PortImpl(NetworkGraph graph, Switch parentSwitch, Long number) {
-		super(graph);
-		this.sw = parentSwitch;
-		this.number = number;
-		this.devices = new HashSet<>();
-	}
+    public PortImpl(NetworkGraph graph, Switch parentSwitch, Long number) {
+        super(graph);
+        this.sw = parentSwitch;
+        this.number = number;
+        this.devices = new HashSet<>();
+    }
 
-	@Override
-	public Long getDpid() {
-	    return sw.getDpid();
-	}
+    @Override
+    public Long getDpid() {
+        return sw.getDpid();
+    }
 
-	@Override
-	public Long getNumber() {
-		return number;
-	}
+    @Override
+    public Long getNumber() {
+        return number;
+    }
 
-	@Override
-	public String getDescription() {
-		return description;
-	}
+    @Override
+    public String getDescription() {
+        return description;
+    }
 
-	public void setDescription(String description) {
-		this.description = description;
-	}
+    public void setDescription(String description) {
+        this.description = description;
+    }
 
-	@Override
-	public Long getHardwareAddress() {
-		// TODO Auto-generated method stub
-		return 0L;
-	}
+    @Override
+    public Long getHardwareAddress() {
+        // TODO Auto-generated method stub
+        return 0L;
+    }
 
-	@Override
-	public Switch getSwitch() {
-		return sw;
-	}
+    @Override
+    public Switch getSwitch() {
+        return sw;
+    }
 
-	@Override
-	public Link getOutgoingLink() {
-		return outgoingLink;
-	}
+    @Override
+    public Link getOutgoingLink() {
+        return outgoingLink;
+    }
 
-	@Override
-	public Link getIncomingLink() {
-		return incomingLink;
-	}
+    @Override
+    public Link getIncomingLink() {
+        return incomingLink;
+    }
 
-	@Override
-	public Iterable<Device> getDevices() {
-	    return Collections.unmodifiableSet(this.devices);
-	}
+    @Override
+    public Iterable<Device> getDevices() {
+        return Collections.unmodifiableSet(this.devices);
+    }
 
-	public void setOutgoingLink(Link link) {
-		outgoingLink = link;
-	}
+    public void setOutgoingLink(Link link) {
+        outgoingLink = link;
+    }
 
-	public void setIncomingLink(Link link) {
-		incomingLink = link;
-	}
+    public void setIncomingLink(Link link) {
+        incomingLink = link;
+    }
 
-	/**
-	 *
-	 * @param d
-	 * @return true if successfully added
-	 */
-	public boolean addDevice(Device d) {
-	    return this.devices.add(d);
-	}
+    /**
+     * @param d
+     * @return true if successfully added
+     */
+    public boolean addDevice(Device d) {
+        return this.devices.add(d);
+    }
 
-	/**
-	 *
-	 * @param d
-	 * @return true if device existed and was removed
-	 */
-	public boolean removeDevice(Device d) {
-	    return this.devices.remove(d);
-	}
+    /**
+     * @param d
+     * @return true if device existed and was removed
+     */
+    public boolean removeDevice(Device d) {
+        return this.devices.remove(d);
+    }
 
-	public void removeAllDevice() {
-	    this.devices.clear();
-	}
+    public void removeAllDevice() {
+        this.devices.clear();
+    }
 
-	@Override
-	public String toString() {
-		return String.format("%d:%d",
-				getSwitch().getDpid(),
-				getNumber());
-	}
+    @Override
+    public String toString() {
+        return String.format("%d:%d",
+                getSwitch().getDpid(),
+                getNumber());
+    }
 }