Revert "Refactoring to move code to right locations. Attempt at breaking dependency cycles."
This reverts commit 58819b4dcc697f63872bee9f3ddd41a0c4d8fca5.
diff --git a/core/api/src/main/java/org/onlab/onos/cluster/MastershipListener.java b/core/api/src/main/java/org/onlab/onos/cluster/MastershipListener.java
new file mode 100644
index 0000000..71d65be
--- /dev/null
+++ b/core/api/src/main/java/org/onlab/onos/cluster/MastershipListener.java
@@ -0,0 +1,9 @@
+package org.onlab.onos.cluster;
+
+import org.onlab.onos.event.EventListener;
+
+/**
+ * Entity capable of receiving device mastership-related events.
+ */
+public interface MastershipListener extends EventListener<MastershipEvent> {
+}