Use final.

Author: Gary Gregory

src/main/java/org/apache/commons/codec/binary/Hex.java

@@ -252,7 +252,7 @@ private static byte[] toByteArray(final ByteBuffer byteBuffer) {
         if (byteBuffer.hasArray()) {
             return byteBuffer.array();
         }
-        byte[] byteArray = new byte[byteBuffer.remaining()];
+        final byte[] byteArray = new byte[byteBuffer.remaining()];
         byteBuffer.get(byteArray);
         return byteArray;
     }