[ONOS-3895, ONOS-3896, ONOS-3897] Data type interfaces

Change-Id: I9cd9d80ce0accc017118a944dff96367bca89bde
diff --git a/src/main/java/org/onosproject/yangutils/datamodel/YangStatusType.java b/src/main/java/org/onosproject/yangutils/datamodel/YangStatusType.java
new file mode 100644
index 0000000..d23ede4
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+++ b/src/main/java/org/onosproject/yangutils/datamodel/YangStatusType.java
@@ -0,0 +1,49 @@
+/*
+ * 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.yangutils.datamodel;
+
+/*
+ * Reference:RFC 6020.
+ * The "status" statement takes as an argument one of the strings
+ * "current", "deprecated", or "obsolete". If no status is specified,
+ * the default is "current".
+ */
+
+/**
+ * ENUM to represent the status of YANG entities.
+ */
+public enum YangStatusType {
+    /**
+     * Reference:RFC 6020.
+     * "current" means that the definition is current and valid.
+     */
+    CURRENT,
+
+    /**
+     * Reference:RFC 6020.
+     * "deprecated" indicates an obsolete definition, but it permits new/
+     * continued implementation in order to foster interoperability with
+     * older/existing implementations.
+     */
+    DEPRECATED,
+
+    /**
+     * Reference:RFC 6020.
+     * "obsolete" means the definition is obsolete and SHOULD NOT be implemented
+     * and/or can be removed from implementations.
+     */
+    OBSOLETE
+}