Added simple link manager implementation.
Added link admin stuff; unit tests to come.
diff --git a/net/api/src/main/java/org/onlab/onos/net/link/LinkAdminService.java b/net/api/src/main/java/org/onlab/onos/net/link/LinkAdminService.java
new file mode 100644
index 0000000..228b3c9
--- /dev/null
+++ b/net/api/src/main/java/org/onlab/onos/net/link/LinkAdminService.java
@@ -0,0 +1,27 @@
+package org.onlab.onos.net.link;
+
+import org.onlab.onos.net.ConnectPoint;
+import org.onlab.onos.net.DeviceId;
+
+/**
+ * Service for administering the inventory of infrastructure links.
+ */
+public interface LinkAdminService {
+
+ /**
+ * Removes all infrastructure links leading to and from the
+ * specified connection point.
+ *
+ * @param connectPoint connection point
+ */
+ void removeLinks(ConnectPoint connectPoint);
+
+ /**
+ * Removes all infrastructure links leading to and from the
+ * specified device.
+ *
+ * @param deviceId device identifier
+ */
+ void removeLinks(DeviceId deviceId);
+
+}