[ONOS-2831] Refactor L2 code according to the L3 plan. 

Change-Id: Ibc9dc47a18208b9b1602261064a33bc63b131fc3
diff --git a/ovsdb/api/src/test/java/org/onosproject/ovsdb/controller/driver/OvsdbClientServiceAdapter.java b/ovsdb/api/src/test/java/org/onosproject/ovsdb/controller/driver/OvsdbClientServiceAdapter.java
index 2c418d5..5d80a7b 100644
--- a/ovsdb/api/src/test/java/org/onosproject/ovsdb/controller/driver/OvsdbClientServiceAdapter.java
+++ b/ovsdb/api/src/test/java/org/onosproject/ovsdb/controller/driver/OvsdbClientServiceAdapter.java
@@ -18,6 +18,7 @@
 
 import com.fasterxml.jackson.databind.JsonNode;
 import com.google.common.util.concurrent.ListenableFuture;
+
 import org.onlab.packet.IpAddress;
 import org.onosproject.net.DeviceId;
 import org.onosproject.net.behaviour.ControllerInfo;
@@ -216,4 +217,9 @@
     public ListenableFuture<List<JsonNode>> transact(DatabaseSchema dbSchema, List<Operation> operations) {
         return null;
     }
+
+    @Override
+    public void createBridge(String bridgeName, String dpid, String exPortName) {
+
+    }
 }