Sketching cluster related stuff with Madan..
diff --git a/core/api/src/main/java/org/onlab/onos/cluster/package-info.java b/core/api/src/main/java/org/onlab/onos/cluster/package-info.java
new file mode 100644
index 0000000..3cb37c3
--- /dev/null
+++ b/core/api/src/main/java/org/onlab/onos/cluster/package-info.java
@@ -0,0 +1,4 @@
+/**
+ * Set of abstractions for dealing with controller cluster related topics.
+ */
+package org.onlab.onos.cluster;
\ No newline at end of file