diff --git a/core/api/src/main/java/org/onosproject/net/group/DefaultGroupKey.java b/core/api/src/main/java/org/onosproject/net/group/DefaultGroupKey.java
index b027300..122d159 100644
--- a/core/api/src/main/java/org/onosproject/net/group/DefaultGroupKey.java
+++ b/core/api/src/main/java/org/onosproject/net/group/DefaultGroupKey.java
@@ -24,7 +24,7 @@
  */
 public class DefaultGroupKey implements GroupKey {
     private final byte[] key;
-    protected static final char[] HEX_ARRAY = "0123456789ABCDEF".toCharArray();
+    private static final char[] HEX_ARRAY = "0123456789ABCDEF".toCharArray();
 
     public DefaultGroupKey(byte[] key) {
         this.key = checkNotNull(key);
diff --git a/protocols/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/ver4/BgpNotificationMsgVer4.java b/protocols/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/ver4/BgpNotificationMsgVer4.java
index 355dbed..3857470 100644
--- a/protocols/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/ver4/BgpNotificationMsgVer4.java
+++ b/protocols/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/ver4/BgpNotificationMsgVer4.java
@@ -52,7 +52,7 @@
     static final int PACKET_MINIMUM_LENGTH = 2;
     static final BgpType MSG_TYPE = BgpType.NOTIFICATION;
     static final byte DEFAULT_ERRORSUBCODE = 0;
-    static final byte[] MARKER = {(byte) 0xff, (byte) 0xff, (byte) 0xff,
+    private static final byte[] MARKER = {(byte) 0xff, (byte) 0xff, (byte) 0xff,
             (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff,
             (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff,
             (byte) 0xff, (byte) 0xff, (byte) 0xff };
diff --git a/protocols/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/ver4/BgpOpenMsgVer4.java b/protocols/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/ver4/BgpOpenMsgVer4.java
index 44c5269..61486ed 100644
--- a/protocols/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/ver4/BgpOpenMsgVer4.java
+++ b/protocols/bgp/bgpio/src/main/java/org/onosproject/bgpio/protocol/ver4/BgpOpenMsgVer4.java
@@ -77,7 +77,7 @@
     public static final byte SAFI = 71;
     public static final byte RES = 0;
     public static final int FOUR_OCTET_AS_NUM_CAPA_TYPE = 65;
-    public static final byte[] MARKER = new byte[]{(byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff,
+    private static final byte[] MARKER = new byte[]{(byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff,
         (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff,
         (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff};
     public static final BgpHeader DEFAULT_OPEN_HEADER = new BgpHeader(MARKER,