diff --git a/src/main/java/net/onrc/onos/api/flowmanager/FlowManagerListener.java b/src/main/java/net/onrc/onos/api/flowmanager/FlowManagerListener.java
new file mode 100644
index 0000000..0e70867
--- /dev/null
+++ b/src/main/java/net/onrc/onos/api/flowmanager/FlowManagerListener.java
@@ -0,0 +1,20 @@
+package net.onrc.onos.api.flowmanager;
+
+/**
+ * An interface to the FlowManager's listener.
+ */
+public interface FlowManagerListener {
+    /**
+     * Handles flow state changes.
+     *
+     * @param event the state changes of the flow objects
+     */
+    public void flowStatesChanged(FlowStatesChangedEvent event);
+
+    /**
+     * Handles flow batch operation's state changes.
+     *
+     * @param event the state changes of the flow batch operations
+     */
+    public void flowBatchStateChanged(FlowBatchStateChangedEvent event);
+}