diff --git a/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/flowClassifier/FlowClassifierService.java b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/flowclassifier/FlowClassifierService.java
similarity index 97%
rename from apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/flowClassifier/FlowClassifierService.java
rename to apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/flowclassifier/FlowClassifierService.java
index e379be8..c160d22 100644
--- a/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/flowClassifier/FlowClassifierService.java
+++ b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/flowclassifier/FlowClassifierService.java
@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.onosproject.vtnrsc.flowClassifier;
+package org.onosproject.vtnrsc.flowclassifier;
 
 import org.onosproject.vtnrsc.FlowClassifier;
 import org.onosproject.vtnrsc.FlowClassifierId;
@@ -69,4 +69,4 @@
      * @return true if Flow Classifier removal is success otherwise return false.
      */
     boolean removeFlowClassifier(FlowClassifierId id);
-}
\ No newline at end of file
+}
diff --git a/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/flowClassifier/impl/FlowClassifierManager.java b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/flowclassifier/impl/FlowClassifierManager.java
similarity index 97%
rename from apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/flowClassifier/impl/FlowClassifierManager.java
rename to apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/flowclassifier/impl/FlowClassifierManager.java
index ca01c43..ee5873d 100644
--- a/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/flowClassifier/impl/FlowClassifierManager.java
+++ b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/flowclassifier/impl/FlowClassifierManager.java
@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.onosproject.vtnrsc.flowClassifier.impl;
+package org.onosproject.vtnrsc.flowclassifier.impl;
 
 import org.apache.felix.scr.annotations.Activate;
 import org.apache.felix.scr.annotations.Component;
@@ -29,7 +29,7 @@
 import org.onosproject.store.service.WallClockTimestamp;
 import org.onosproject.vtnrsc.FlowClassifierId;
 import org.onosproject.vtnrsc.FlowClassifier;
-import org.onosproject.vtnrsc.flowClassifier.FlowClassifierService;
+import org.onosproject.vtnrsc.flowclassifier.FlowClassifierService;
 import org.slf4j.Logger;
 
 import static org.slf4j.LoggerFactory.getLogger;
@@ -121,4 +121,4 @@
         }
         return true;
     }
-}
\ No newline at end of file
+}
diff --git a/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/flowClassifier/impl/package-info.java b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/flowclassifier/impl/package-info.java
similarity index 92%
rename from apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/flowClassifier/impl/package-info.java
rename to apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/flowclassifier/impl/package-info.java
index 4ea050b..62b5603 100644
--- a/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/flowClassifier/impl/package-info.java
+++ b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/flowclassifier/impl/package-info.java
@@ -17,4 +17,4 @@
 /**
  * Provides implementation of the flow Classifier service.
  */
-package org.onosproject.vtnrsc.flowClassifier.impl;
+package org.onosproject.vtnrsc.flowclassifier.impl;
diff --git a/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/flowClassifier/package-info.java b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/flowclassifier/package-info.java
similarity index 93%
rename from apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/flowClassifier/package-info.java
rename to apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/flowclassifier/package-info.java
index 0758417..c8c75bf 100644
--- a/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/flowClassifier/package-info.java
+++ b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/flowclassifier/package-info.java
@@ -17,4 +17,4 @@
 /**
  * Service for interacting with flow Classifier of SFC.
  */
-package org.onosproject.vtnrsc.flowClassifier;
+package org.onosproject.vtnrsc.flowclassifier;
diff --git a/apps/vtn/vtnweb/src/main/java/org/onosproject/vtnweb/resources/FlowClassifierWebResource.java b/apps/vtn/vtnweb/src/main/java/org/onosproject/vtnweb/resources/FlowClassifierWebResource.java
index b5b8252..7a57c0a 100644
--- a/apps/vtn/vtnweb/src/main/java/org/onosproject/vtnweb/resources/FlowClassifierWebResource.java
+++ b/apps/vtn/vtnweb/src/main/java/org/onosproject/vtnweb/resources/FlowClassifierWebResource.java
@@ -39,7 +39,7 @@
 import org.onosproject.vtnrsc.FlowClassifier;
 import org.onosproject.vtnrsc.FlowClassifierId;
 import org.onosproject.rest.AbstractWebResource;
-import org.onosproject.vtnrsc.flowClassifier.FlowClassifierService;
+import org.onosproject.vtnrsc.flowclassifier.FlowClassifierService;
 import org.onosproject.vtnweb.web.FlowClassifierCodec;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
diff --git a/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/BGPLSNlri.java b/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/BGPLSNlri.java
index 572e2ae..189edb8 100644
--- a/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/BGPLSNlri.java
+++ b/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/BGPLSNlri.java
@@ -16,7 +16,7 @@
 package org.onosproject.bgpio.protocol;
 
 import org.onosproject.bgpio.exceptions.BGPParseException;
-import org.onosproject.bgpio.protocol.link_state.BGPNodeLSNlriVer4.PROTOCOLTYPE;
+import org.onosproject.bgpio.protocol.linkstate.BGPNodeLSNlriVer4.PROTOCOLTYPE;
 import org.onosproject.bgpio.types.RouteDistinguisher;
 
 /**
@@ -51,4 +51,4 @@
      * @return Route distinguisher in Nlri
      */
     RouteDistinguisher getRouteDistinguisher();
-}
\ No newline at end of file
+}
diff --git a/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/BGPNodeLSNlri.java b/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/BGPNodeLSNlri.java
index fd5b805..b6e4a3a 100644
--- a/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/BGPNodeLSNlri.java
+++ b/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/BGPNodeLSNlri.java
@@ -15,7 +15,7 @@
  */
 package org.onosproject.bgpio.protocol;
 
-import org.onosproject.bgpio.protocol.link_state.BGPNodeLSIdentifier;
+import org.onosproject.bgpio.protocol.linkstate.BGPNodeLSIdentifier;
 
 /**
  * Abstraction of an entity providing BGP-LS Node NLRI.
@@ -27,4 +27,4 @@
      * @return local node descriptors
      */
     BGPNodeLSIdentifier getLocalNodeDescriptors();
-}
\ No newline at end of file
+}
diff --git a/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/BGPPrefixLSNlri.java b/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/BGPPrefixLSNlri.java
index 7e849f4..2c331a2 100644
--- a/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/BGPPrefixLSNlri.java
+++ b/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/BGPPrefixLSNlri.java
@@ -18,7 +18,7 @@
 import java.util.LinkedList;
 
 import org.onosproject.bgpio.types.BGPValueType;
-import org.onosproject.bgpio.protocol.link_state.NodeDescriptors;
+import org.onosproject.bgpio.protocol.linkstate.NodeDescriptors;
 
 /**
  * Abstraction of an entity providing BGP-LS Prefix NLRI.
@@ -37,4 +37,4 @@
      * @return list of Prefix descriptor
      */
     LinkedList<BGPValueType> getPrefixdescriptor();
-}
\ No newline at end of file
+}
diff --git a/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/link_state/BGPLinkLSIdentifier.java b/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/linkstate/BGPLinkLSIdentifier.java
similarity index 99%
rename from bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/link_state/BGPLinkLSIdentifier.java
rename to bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/linkstate/BGPLinkLSIdentifier.java
index 3229cc1..ffea74d 100755
--- a/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/link_state/BGPLinkLSIdentifier.java
+++ b/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/linkstate/BGPLinkLSIdentifier.java
@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.onosproject.bgpio.protocol.link_state;
+package org.onosproject.bgpio.protocol.linkstate;
 
 import java.util.Iterator;
 import java.util.LinkedList;
@@ -249,4 +249,4 @@
                 .add("linkDescriptor", linkDescriptor)
                 .toString();
     }
-}
\ No newline at end of file
+}
diff --git a/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/link_state/BGPNodeLSIdentifier.java b/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/linkstate/BGPNodeLSIdentifier.java
similarity index 98%
rename from bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/link_state/BGPNodeLSIdentifier.java
rename to bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/linkstate/BGPNodeLSIdentifier.java
index cd2422a..603bf6e 100644
--- a/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/link_state/BGPNodeLSIdentifier.java
+++ b/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/linkstate/BGPNodeLSIdentifier.java
@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.onosproject.bgpio.protocol.link_state;
+package org.onosproject.bgpio.protocol.linkstate;
 
 import java.util.Objects;
 
@@ -110,4 +110,4 @@
                 .add("NodeDescriptors", nodeDescriptors)
                 .toString();
     }
-}
\ No newline at end of file
+}
diff --git a/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/link_state/BGPNodeLSNlriVer4.java b/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/linkstate/BGPNodeLSNlriVer4.java
similarity index 99%
rename from bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/link_state/BGPNodeLSNlriVer4.java
rename to bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/linkstate/BGPNodeLSNlriVer4.java
index 04780d8..54837ee 100644
--- a/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/link_state/BGPNodeLSNlriVer4.java
+++ b/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/linkstate/BGPNodeLSNlriVer4.java
@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.onosproject.bgpio.protocol.link_state;
+package org.onosproject.bgpio.protocol.linkstate;
 
 import org.jboss.netty.buffer.ChannelBuffer;
 import org.onosproject.bgpio.exceptions.BGPParseException;
@@ -209,4 +209,4 @@
                 .add("localNodeDescriptors", localNodeDescriptors)
                 .toString();
     }
-}
\ No newline at end of file
+}
diff --git a/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/link_state/BGPPrefixIPv4LSNlriVer4.java b/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/linkstate/BGPPrefixIPv4LSNlriVer4.java
similarity index 97%
rename from bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/link_state/BGPPrefixIPv4LSNlriVer4.java
rename to bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/linkstate/BGPPrefixIPv4LSNlriVer4.java
index 0f18c75..6d6f48b 100644
--- a/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/link_state/BGPPrefixIPv4LSNlriVer4.java
+++ b/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/linkstate/BGPPrefixIPv4LSNlriVer4.java
@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.onosproject.bgpio.protocol.link_state;
+package org.onosproject.bgpio.protocol.linkstate;
 
 import java.util.LinkedList;
 
@@ -21,7 +21,7 @@
 import org.onosproject.bgpio.exceptions.BGPParseException;
 import org.onosproject.bgpio.protocol.BGPPrefixLSNlri;
 import org.onosproject.bgpio.protocol.NlriType;
-import org.onosproject.bgpio.protocol.link_state.BGPNodeLSNlriVer4.PROTOCOLTYPE;
+import org.onosproject.bgpio.protocol.linkstate.BGPNodeLSNlriVer4.PROTOCOLTYPE;
 import org.onosproject.bgpio.types.BGPValueType;
 import org.onosproject.bgpio.types.RouteDistinguisher;
 import org.onosproject.bgpio.util.Constants;
@@ -202,4 +202,4 @@
                 .add("bgpPrefixLSIdentifier", bgpPrefixLSIdentifier)
                 .toString();
     }
-}
\ No newline at end of file
+}
diff --git a/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/link_state/BGPPrefixLSIdentifier.java b/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/linkstate/BGPPrefixLSIdentifier.java
similarity index 99%
rename from bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/link_state/BGPPrefixLSIdentifier.java
rename to bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/linkstate/BGPPrefixLSIdentifier.java
index 4fef47f..23f4179 100644
--- a/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/link_state/BGPPrefixLSIdentifier.java
+++ b/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/linkstate/BGPPrefixLSIdentifier.java
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.onosproject.bgpio.protocol.link_state;
+package org.onosproject.bgpio.protocol.linkstate;
 
 import java.util.Iterator;
 import java.util.LinkedList;
@@ -225,4 +225,4 @@
                 .add("prefixDescriptor", prefixDescriptor)
                 .toString();
     }
-}
\ No newline at end of file
+}
diff --git a/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/link_state/NodeDescriptors.java b/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/linkstate/NodeDescriptors.java
similarity index 99%
rename from bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/link_state/NodeDescriptors.java
rename to bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/linkstate/NodeDescriptors.java
index a03b2ba..74637c7 100644
--- a/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/link_state/NodeDescriptors.java
+++ b/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/linkstate/NodeDescriptors.java
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.onosproject.bgpio.protocol.link_state;
+package org.onosproject.bgpio.protocol.linkstate;
 
 import java.util.Iterator;
 import java.util.LinkedList;
@@ -222,4 +222,4 @@
                 .add("subTlvs", subTlvs)
                 .toString();
     }
-}
\ No newline at end of file
+}
diff --git a/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/link_state/package-info.java b/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/linkstate/package-info.java
similarity index 92%
rename from bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/link_state/package-info.java
rename to bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/linkstate/package-info.java
index d2a2ccf..87ba60f 100755
--- a/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/link_state/package-info.java
+++ b/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/linkstate/package-info.java
@@ -17,4 +17,4 @@
 /**
  * BGP Protocol specific link state details.
  */
-package org.onosproject.bgpio.protocol.link_state;
\ No newline at end of file
+package org.onosproject.bgpio.protocol.linkstate;
diff --git a/pom.xml b/pom.xml
index 4686e3f..0236960 100644
--- a/pom.xml
+++ b/pom.xml
@@ -48,6 +48,7 @@
         <module>ovsdb</module>
         <module>netconf</module>
         <module>pcep</module>
+        <module>bgp</module>
 
         <module>providers</module>
         <module>drivers</module>
@@ -59,7 +60,6 @@
         <module>tools/package/archetypes</module>
         <module>tools/package/branding</module>
         <module>tools/build/conf</module>
-        <module>bgp</module>
     </modules>
 
     <url>http://onosproject.org/</url>
diff --git a/tools/build/conf/src/main/resources/onos/checkstyle.xml b/tools/build/conf/src/main/resources/onos/checkstyle.xml
index e04479c..fc6757a 100644
--- a/tools/build/conf/src/main/resources/onos/checkstyle.xml
+++ b/tools/build/conf/src/main/resources/onos/checkstyle.xml
@@ -160,7 +160,9 @@
 
         <module name="MemberName"/>
         <module name="MethodName"/>
-        <module name="PackageName"/>
+        <module name="PackageName">
+            <property name="format" value="^[a-z]+(\.[a-z][a-z0-9]*)*$"/>
+        </module>
         <module name="ParameterName"/>
         <module name="StaticVariableName"/>
         <module name="TypeName"/>