diff --git a/apps/scalablegateway/src/main/java/org/onosproject/scalablegateway/impl/ScalableGatewayManager.java b/apps/scalablegateway/src/main/java/org/onosproject/scalablegateway/impl/ScalableGatewayManager.java
new file mode 100644
index 0000000..3294a09
--- /dev/null
+++ b/apps/scalablegateway/src/main/java/org/onosproject/scalablegateway/impl/ScalableGatewayManager.java
@@ -0,0 +1,66 @@
+/*
+ * 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.scalablegateway.impl;
+
+import org.onosproject.core.GroupId;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.PortNumber;
+import org.onosproject.scalablegateway.api.GatewayNode;
+import org.onosproject.scalablegateway.api.ScalableGatewayService;
+
+import java.util.List;
+
+/**
+ * Manages gateway node for gateway scalability.
+ */
+public class ScalableGatewayManager implements ScalableGatewayService {
+
+    @Override
+    public GatewayNode getGatewayNode(DeviceId deviceId) {
+        return null;
+    }
+
+    @Override
+    public List<PortNumber> getGatewayExternalPorts(DeviceId deviceId) {
+        return null;
+    }
+
+    @Override
+    public GroupId getGroupIdForGatewayLoadBalance(DeviceId srcDeviceId) {
+        return null;
+    }
+
+    @Override
+    public List<GatewayNode> getGatewayNodes() {
+        return null;
+    }
+
+    @Override
+    public List<DeviceId> getGatewayDeviceIds() {
+        return null;
+    }
+
+    @Override
+    public boolean addGatewayNode(GatewayNode gatewayNode) {
+        return false;
+    }
+
+    @Override
+    public boolean deleteGatewayNode(GatewayNode gatewayNode) {
+        return false;
+    }
+}