Modified bgp file name according to naming convention.

Change-Id: I403139b53fbc1a2dba894dfd39720707a52ba7cd
diff --git a/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/ver4/BgpFactoryVer4.java b/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/ver4/BgpFactoryVer4.java
new file mode 100755
index 0000000..c57832b
--- /dev/null
+++ b/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/ver4/BgpFactoryVer4.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2015 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.bgpio.protocol.ver4;
+
+import org.onosproject.bgpio.protocol.BgpFactory;
+import org.onosproject.bgpio.protocol.BgpKeepaliveMsg;
+import org.onosproject.bgpio.protocol.BgpMessage;
+import org.onosproject.bgpio.protocol.BgpMessageReader;
+import org.onosproject.bgpio.protocol.BgpNotificationMsg;
+import org.onosproject.bgpio.protocol.BgpOpenMsg;
+import org.onosproject.bgpio.protocol.BgpVersion;
+
+/**
+ * Provides BGP Factory and returns builder classes for all objects and messages.
+ */
+public class BgpFactoryVer4 implements BgpFactory {
+
+    public static final BgpFactoryVer4 INSTANCE = new BgpFactoryVer4();
+
+    @Override
+    public BgpOpenMsg.Builder openMessageBuilder() {
+        return new BgpOpenMsgVer4.Builder();
+    }
+
+    @Override
+    public BgpKeepaliveMsg.Builder keepaliveMessageBuilder() {
+        return new BgpKeepaliveMsgVer4.Builder();
+    }
+
+    @Override
+    public BgpNotificationMsg.Builder notificationMessageBuilder() {
+        return new BgpNotificationMsgVer4.Builder();
+    }
+
+    @Override
+    public BgpMessageReader<BgpMessage> getReader() {
+        return BgpMessageVer4.READER;
+    }
+
+    @Override
+    public BgpVersion getVersion() {
+        return BgpVersion.BGP_4;
+    }
+}
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