[ONOS-6183] NET l3VPN structure and store implementation

Change-Id: I2fc9054dba07ef522b3cc879810422bd0f1f5de4
diff --git a/apps/l3vpn/netl3vpn/src/main/java/org/onosproject/l3vpn/netl3vpn/NetL3VpnException.java b/apps/l3vpn/netl3vpn/src/main/java/org/onosproject/l3vpn/netl3vpn/NetL3VpnException.java
new file mode 100644
index 0000000..066e4fd
--- /dev/null
+++ b/apps/l3vpn/netl3vpn/src/main/java/org/onosproject/l3vpn/netl3vpn/NetL3VpnException.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2017-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.l3vpn.netl3vpn;
+
+/**
+ * Representation of exception that needs to be handled by net l3 VPN.
+ */
+public class NetL3VpnException extends RuntimeException {
+
+    /**
+     * Creates net l3 VPN exception with an exception message.
+     *
+     * @param excMsg message
+     */
+    public NetL3VpnException(String excMsg) {
+        super(excMsg);
+    }
+
+    /**
+     * Creates net l3 VPN exception with a cause for it.
+     *
+     * @param cause cause
+     */
+    public NetL3VpnException(Throwable cause) {
+        super(cause);
+    }
+}