--- /dev/null
+package org.opendaylight.controller.md.sal.common.api;
+
+import java.util.EventListener;
+
+import org.opendaylight.yangtools.concepts.Registration;
+
+public interface RegistrationListener<T extends Registration<?>> extends EventListener {
+
+ void onRegister(T registration);
+
+ void onUnregister(T registration);
+}