protocol independent host tracker

Change-Id: I192a17ee6eee347f6a7d8e251cecc49cbe36f8dc
diff --git a/providers/host/src/main/java/org/onlab/onos/provider/host/impl/package-info.java b/providers/host/src/main/java/org/onlab/onos/provider/host/impl/package-info.java
new file mode 100644
index 0000000..25b5315
--- /dev/null
+++ b/providers/host/src/main/java/org/onlab/onos/provider/host/impl/package-info.java
@@ -0,0 +1,4 @@
+/**
+ * Provider that uses packet service as a means of host discovery and tracking.
+ */
+package org.onlab.onos.provider.host.impl;