[CORD-1434][CORD-1112] DHCP relay manager

Change-Id: I2e4d8fc8e85ed66b33ac517660ee72a1c0183597
diff --git a/core/api/src/test/java/org/onosproject/net/host/HostStoreAdapter.java b/core/api/src/test/java/org/onosproject/net/host/HostStoreAdapter.java
new file mode 100644
index 0000000..796e6d6
--- /dev/null
+++ b/core/api/src/test/java/org/onosproject/net/host/HostStoreAdapter.java
@@ -0,0 +1,111 @@
+/*
+ * 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.net.host;
+
+import org.onlab.packet.IpAddress;
+import org.onlab.packet.MacAddress;
+import org.onlab.packet.VlanId;
+import org.onosproject.net.ConnectPoint;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.Host;
+import org.onosproject.net.HostId;
+import org.onosproject.net.HostLocation;
+import org.onosproject.net.provider.ProviderId;
+
+import java.util.Set;
+
+/**
+ * Test adapter for host store.
+ */
+public class HostStoreAdapter implements HostStore {
+    @Override
+    public void setDelegate(HostStoreDelegate delegate) {
+
+    }
+
+    @Override
+    public void unsetDelegate(HostStoreDelegate delegate) {
+
+    }
+
+    @Override
+    public boolean hasDelegate() {
+        return false;
+    }
+
+    @Override
+    public HostEvent createOrUpdateHost(ProviderId providerId,
+                                        HostId hostId,
+                                        HostDescription hostDescription,
+                                        boolean replaceIps) {
+        return null;
+    }
+
+    @Override
+    public HostEvent removeHost(HostId hostId) {
+        return null;
+    }
+
+    @Override
+    public HostEvent removeIp(HostId hostId, IpAddress ipAddress) {
+        return null;
+    }
+
+    @Override
+    public void removeLocation(HostId hostId, HostLocation location) {
+
+    }
+
+    @Override
+    public int getHostCount() {
+        return 0;
+    }
+
+    @Override
+    public Iterable<Host> getHosts() {
+        return null;
+    }
+
+    @Override
+    public Host getHost(HostId hostId) {
+        return null;
+    }
+
+    @Override
+    public Set<Host> getHosts(VlanId vlanId) {
+        return null;
+    }
+
+    @Override
+    public Set<Host> getHosts(MacAddress mac) {
+        return null;
+    }
+
+    @Override
+    public Set<Host> getHosts(IpAddress ip) {
+        return null;
+    }
+
+    @Override
+    public Set<Host> getConnectedHosts(ConnectPoint connectPoint) {
+        return null;
+    }
+
+    @Override
+    public Set<Host> getConnectedHosts(DeviceId deviceId) {
+        return null;
+    }
+}