Added default link description & model entities.
diff --git a/net/api/src/main/java/org/onlab/onos/net/DefaultDevice.java b/net/api/src/main/java/org/onlab/onos/net/DefaultDevice.java
index 42a3526..8b4591c 100644
--- a/net/api/src/main/java/org/onlab/onos/net/DefaultDevice.java
+++ b/net/api/src/main/java/org/onlab/onos/net/DefaultDevice.java
@@ -7,7 +7,7 @@
 import static com.google.common.base.Objects.toStringHelper;
 
 /**
- * Default device model implementation.
+ * Default infrastructure device model implementation.
  */
 public class DefaultDevice extends AbstractElement implements Device {