Initial implementation of kubevirt network with CRUD ops support

Change-Id: I6a366fcd301e67f62a74fb828eea1ac67f2a2128
diff --git a/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/KubevirtNetworkEvent.java b/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/KubevirtNetworkEvent.java
new file mode 100644
index 0000000..ee3487f
--- /dev/null
+++ b/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/KubevirtNetworkEvent.java
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2021-present Open Networking Foundation
+ *
+ * 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.kubevirtnetworking.api;
+
+import org.onosproject.event.AbstractEvent;
+
+/**
+ * Describes kubevirt network service event.
+ */
+public class KubevirtNetworkEvent extends AbstractEvent<KubevirtNetworkEvent.Type, KubevirtNetwork> {
+
+    public KubevirtNetworkEvent(Type type, KubevirtNetwork subject) {
+        super(type, subject);
+    }
+
+    /**
+     * kubevirt network events.
+     */
+    public enum Type {
+
+        /**
+         * Signifies that a new kubevirt network is created.
+         */
+        KUBEVIRT_NETWORK_CREATED,
+
+        /**
+         * Signifies that the kubevirt network is updated.
+         */
+        KUBEVIRT_NETWORK_UPDATED,
+
+        /**
+         * Signifies that the kubevirt network is removed.
+         */
+        KUBEVIRT_NETWORK_REMOVED,
+    }
+}