ONOS-3124 Sketch of simplified intent domain service

Change-Id: I6d8304214897ba75a299bfd9bd90b4591ae8eb04
diff --git a/incubator/api/src/main/java/org/onosproject/incubator/net/domain/IntentDomainEvent.java b/incubator/api/src/main/java/org/onosproject/incubator/net/domain/IntentDomainEvent.java
new file mode 100644
index 0000000..03f4eab
--- /dev/null
+++ b/incubator/api/src/main/java/org/onosproject/incubator/net/domain/IntentDomainEvent.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onosproject.incubator.net.domain;
+
+import org.onosproject.event.AbstractEvent;
+
+/**
+ * Describes an intent domain event.
+ */
+public class IntentDomainEvent
+        extends AbstractEvent<IntentDomainEvent.Type, IntentDomain> {
+
+    public enum Type {
+        DOMAIN_ADDED,
+        DOMAIN_MODIFIED,
+        DOMAIN_REMOVED
+    }
+
+    protected IntentDomainEvent(Type type, IntentDomain subject) {
+        super(type, subject);
+    }
+}