Add Kubevirt Port and Instance classes with CURD interfaces

Change-Id: I1afbba8a04bc1872cc1c086f2e3a15620533d517
diff --git a/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/KubevirtPortStore.java b/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/KubevirtPortStore.java
new file mode 100644
index 0000000..0daf301
--- /dev/null
+++ b/apps/kubevirt-networking/api/src/main/java/org/onosproject/kubevirtnetworking/api/KubevirtPortStore.java
@@ -0,0 +1,70 @@
+/*
+ * 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.onlab.packet.MacAddress;
+import org.onosproject.store.Store;
+
+import java.util.Set;
+
+/**
+ * Manages inventory of kubevirt port; not intended for direct use.
+ */
+public interface KubevirtPortStore
+        extends Store<KubevirtPortEvent, KubevirtPortStoreDelegate> {
+
+    /**
+     * Creates a new kubevirt port.
+     *
+     * @param port kubevirt port
+     */
+    void createPort(KubevirtPort port);
+
+    /**
+     * Updates the kubevirt port.
+     *
+     * @param port kubevirt port
+     */
+    void updatedPort(KubevirtPort port);
+
+    /**
+     * Removes the kubevirt port with the given MAC address.
+     *
+     * @param mac port MAC address
+     * @return removed kubevirt port; null if failed
+     */
+    KubevirtPort removePort(MacAddress mac);
+
+    /**
+     * Returns the kubevirt port with the given port MAC.
+     *
+     * @param mac port MAC address
+     * @return kubevirt port; null if not found
+     */
+    KubevirtPort port(MacAddress mac);
+
+    /**
+     * Returns all kubevirt ports.
+     *
+     * @return set of kubevirt ports
+     */
+    Set<KubevirtPort> ports();
+
+    /**
+     * Removes all kubevirt ports.
+     */
+    void clear();
+}