Fix build warnings

src/main/java/com/mattrixwv/cipherstream/combination/ADFGX.java

@@ -1,23 +1,3 @@
-//CipherStreamJava/src/main/java/com/mattrixwv/cipherstream/combination/ADFGX.java
-//Mattrixwv
-// Created: 01-25-22
-//Modified: 08-11-24
-/*
-	Copyright (C) 2024  Mattrixwv
-
-	This program is free software: you can redistribute it and/or modify
-	it under the terms of the GNU Lesser General Public License as published by
-	the Free Software Foundation, either version 3 of the License, or
-	(at your option) any later version.
-
-	This program is distributed in the hope that it will be useful,
-	but WITHOUT ANY WARRANTY; without even the implied warranty of
-	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-	GNU Lesser General Public License for more details.
-
-	You should have received a copy of the GNU Lesser General Public License
-	along with this program.  If not, see <https://www.gnu.org/licenses/>.
-*/
 package com.mattrixwv.cipherstream.combination;
 
 
@@ -43,7 +23,7 @@ import com.mattrixwv.cipherstream.polysubstitution.PolybiusSquare;
  * 	<li>Encoding/decoding with a columnar transposition cipher (Columnar)</li>
  * </ol>
  */
-public class ADFGX{
+public final class ADFGX{
 	private static final Logger logger = LoggerFactory.getLogger(ADFGX.class);
 
 	//?Internal fields