CodeReview - Initial Commit for Kafka Integration Application

1. Partial REST API implementation
2. Partial Event Manager backend implementation

Change-Id: Ieaf703f7a3f6e296aea8ffcf155c7a1b603236ca
diff --git a/apps/kafka-integration/src/main/java/org/onosproject/kafkaintegration/api/dto/OnosEvent.java b/apps/kafka-integration/src/main/java/org/onosproject/kafkaintegration/api/dto/OnosEvent.java
new file mode 100644
index 0000000..ff1d27e
--- /dev/null
+++ b/apps/kafka-integration/src/main/java/org/onosproject/kafkaintegration/api/dto/OnosEvent.java
@@ -0,0 +1,43 @@
+/**
+ * Copyright 2016-present 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.kafkaintegration.api.dto;
+
+import org.onosproject.event.AbstractEvent;
+
+import com.google.protobuf.GeneratedMessage;
+
+/**
+ * Represents the converted Onos Event data into GPB format.
+ *
+ */
+public class OnosEvent extends AbstractEvent<OnosEvent.Type, GeneratedMessage> {
+
+    /**
+     * Creates a new Onos Event.
+     *
+     * @param type The Type of Onos Event
+     * @param subject Protobuf message corresponding to the Onos Event
+     */
+    public OnosEvent(Type type, GeneratedMessage subject) {
+        super(type, subject);
+    }
+
+    /**
+     * List of Event Types supported.
+     */
+    public enum Type {
+        DEVICE, LINK;
+    }
+}