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diff --git a/samples/interfaces/mapping/src/main/java/io/fd/honeycomb/samples/interfaces/mapping/init/InterfacesInitializer.java b/samples/interfaces/mapping/src/main/java/io/fd/honeycomb/samples/interfaces/mapping/init/InterfacesInitializer.java
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+++ b/samples/interfaces/mapping/src/main/java/io/fd/honeycomb/samples/interfaces/mapping/init/InterfacesInitializer.java
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+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ *
+ * 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 io.fd.honeycomb.samples.interfaces.mapping.init;
+
+import com.google.inject.Inject;
+import com.google.inject.name.Named;
+import io.fd.honeycomb.data.init.AbstractDataTreeConverter;
+import java.util.stream.Collectors;
+import org.opendaylight.controller.md.sal.binding.api.DataBroker;
+import org.opendaylight.yang.gen.v1.io.fd.honeycomb.samples.interfaces.rev160810.Interfaces;
+import org.opendaylight.yang.gen.v1.io.fd.honeycomb.samples.interfaces.rev160810.InterfacesBuilder;
+import org.opendaylight.yang.gen.v1.io.fd.honeycomb.samples.interfaces.rev160810.InterfacesState;
+import org.opendaylight.yang.gen.v1.io.fd.honeycomb.samples.interfaces.rev160810.interfaces.InterfaceBuilder;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * This is an initializer for interfaces plugin. Its main goal is to revers-engineer configuration data (config "true")
+ * for interfaces model from operational data. In this case, we are trying to recreate Interfaces container from InterfacesState
+ * container. Thanks to symmetrical nature of the model, it's pretty straightforward.
+ *
+ * This is very useful when the lower layer already contains some data that should be revers-engineer to config data
+ * in honeycomb in order to get HC and lower layer to sync... It makes life of upper layers much easier
+ *
+ * However it's not always possible to perform this task so the initializers are optional for plugins
+ */
+public class InterfacesInitializer extends AbstractDataTreeConverter<InterfacesState, Interfaces> {
+
+    private static final Logger LOG = LoggerFactory.getLogger(InterfacesInitializer.class);
+
+    @Inject
+    public InterfacesInitializer(@Named("honeycomb-initializer") final DataBroker bindingDataBroker) {
+        super(bindingDataBroker,
+                InstanceIdentifier.create(InterfacesState.class), InstanceIdentifier.create(Interfaces.class));
+    }
+
+    @Override
+    protected Interfaces convert(final InterfacesState operationalData) {
+        // Just convert operational data into config data
+        // The operational data are queried from lower layer using readerCustomizers from this plugin
+
+        LOG.info("Initializing interfaces config data from: {}", operationalData);
+
+        return new InterfacesBuilder()
+                .setInterface(operationalData.getInterface().stream()
+                        .map(oper -> new InterfaceBuilder()
+                                .setMtu(oper.getMtu())
+                                .setInterfaceId(oper.getInterfaceId())
+                                .build())
+                        .collect(Collectors.toList()))
+                .build();
+    }
+}