[ONOS-4621] Unit Tests for Snmp provider and protocol

Change-Id: If70c701478762201b3739d9bd017c9f7eec75db1
diff --git a/protocols/snmp/ctl/src/test/java/org/onosproject/snmp/ctl/ISnmpSessionAdapter.java b/protocols/snmp/ctl/src/test/java/org/onosproject/snmp/ctl/ISnmpSessionAdapter.java
new file mode 100644
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+++ b/protocols/snmp/ctl/src/test/java/org/onosproject/snmp/ctl/ISnmpSessionAdapter.java
@@ -0,0 +1,83 @@
+/*
+ * Copyright 2016 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.snmp.ctl;
+
+import com.btisystems.pronx.ems.core.model.DeviceEntityDescription;
+import com.btisystems.pronx.ems.core.snmp.ISnmpSession;
+import com.btisystems.pronx.ems.core.snmp.IVariableBindingHandler;
+import com.btisystems.pronx.ems.core.snmp.SnmpIoException;
+import com.btisystems.pronx.ems.core.snmp.WalkResponse;
+import org.snmp4j.smi.OID;
+import org.snmp4j.smi.VariableBinding;
+
+import java.io.IOException;
+import java.net.InetAddress;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * AdapterClass for ISnmpSession.
+ */
+public class ISnmpSessionAdapter implements ISnmpSession {
+    @Override
+    public String identifyDevice() {
+        return null;
+    }
+
+    @Override
+    public String getVariable(String oid) {
+        return null;
+    }
+
+    @Override
+    public Integer getVariableAsInt(String oid) {
+        return null;
+    }
+
+    @Override
+    public WalkResponse walkDevice(IVariableBindingHandler networkDevice, List<OID> oids)
+            throws IOException {
+        return null;
+    }
+
+    @Override
+    public WalkResponse getTableRows(IVariableBindingHandler networkDevice,
+                                     Map<DeviceEntityDescription, List<OID>> tableIndexes)
+            throws IOException {
+        return null;
+    }
+
+    @Override
+    public InetAddress getAddress() {
+        return null;
+    }
+
+    @Override
+    public void close() throws IOException {
+
+    }
+
+    @Override
+    public void setVariables(VariableBinding[] bindings) {
+
+    }
+
+    @Override
+    public void checkErrorCodeAndDescription() throws SnmpIoException {
+
+    }
+}
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