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diff --git a/opendaylight/md-sal/sal-common-api/src/main/java/org/opendaylight/controller/md/sal/common/api/data/AsyncReadOnlyTransaction.java b/opendaylight/md-sal/sal-common-api/src/main/java/org/opendaylight/controller/md/sal/common/api/data/AsyncReadOnlyTransaction.java
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+++ b/opendaylight/md-sal/sal-common-api/src/main/java/org/opendaylight/controller/md/sal/common/api/data/AsyncReadOnlyTransaction.java
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+/*
+ * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.opendaylight.controller.md.sal.common.api.data;
+
+import org.opendaylight.yangtools.concepts.Path;
+
+/**
+ * Read-only transaction, which provides stable view of data
+ * and is {@link AutoCloseable} resource.
+ *
+ * @see AsyncReadTransaction
+ *
+* @param <P>
+ *            Type of path (subtree identifier), which represents location in
+ *            tree
+ * @param <D>
+ *            Type of data (payload), which represents data payload
+ */
+public interface AsyncReadOnlyTransaction<P extends Path<P>, D> extends AsyncReadTransaction<P, D>, AutoCloseable {
+
+    /**
+     * Closes transaction and releases all resources associated with it.
+     *
+     */
+    @Override
+    public void close();
+}