style: enable HideUtilityClassConstructor in checkstyle (#5147)

src/main/java/com/thealgorithms/ciphers/AES.java

@@ -7,7 +7,9 @@ import java.util.Scanner;
  * This class is build to demonstrate the application of the AES-algorithm on a
  * single 128-Bit block of data.
  */
-public class AES {
+public final class AES {
+    private AES() {
+    }
 
     /**
      * Precalculated values for x to the power of 2 in Rijndaels galois field.

src/main/java/com/thealgorithms/ciphers/AESEncryption.java

@@ -17,7 +17,9 @@ import javax.crypto.spec.GCMParameterSpec;
  * hence in the following program we display it in hexadecimal format of the
  * underlying bytes.
  */
-public class AESEncryption {
+public final class AESEncryption {
+    private AESEncryption() {
+    }
 
     private static final char[] HEX_ARRAY = "0123456789ABCDEF".toCharArray();
     private static Cipher aesCipher;

src/main/java/com/thealgorithms/ciphers/AffineCipher.java

@@ -1,6 +1,8 @@
 package com.thealgorithms.ciphers;
 
-class AffineCipher {
+final class AffineCipher {
+    private AffineCipher() {
+    }
 
     // Key values of a and b
     static int a = 17;

src/main/java/com/thealgorithms/ciphers/ColumnarTranspositionCipher.java

@@ -7,7 +7,9 @@ import java.util.Objects;
  *
  * @author <a href="https://github.com/freitzzz">freitzzz</a>
  */
-public class ColumnarTranspositionCipher {
+public final class ColumnarTranspositionCipher {
+    private ColumnarTranspositionCipher() {
+    }
 
     private static String keyword;
     private static Object[][] table;

src/main/java/com/thealgorithms/ciphers/HillCipher.java

@@ -11,7 +11,9 @@ import java.util.Scanner;
  * for encryption. The cipher key and plaintext/ciphertext are user inputs.
  * @author Ojasva Jain
  */
-public class HillCipher {
+public final class HillCipher {
+    private HillCipher() {
+    }
 
     static Scanner userInput = new Scanner(System.in);
 

src/main/java/com/thealgorithms/ciphers/Polybius.java

@@ -13,7 +13,9 @@ package com.thealgorithms.ciphers;
  * @author Hikmet ÇAKIR
  * @since 08-07-2022+03:00
  */
-public class Polybius {
+public final class Polybius {
+    private Polybius() {
+    }
 
     private static final char[][] KEY = {
         //         0    1    2    3    4

src/main/java/com/thealgorithms/ciphers/ProductCipher.java

@@ -2,7 +2,9 @@ package com.thealgorithms.ciphers;
 
 import java.util.Scanner;
 
-class ProductCipher {
+final class ProductCipher {
+    private ProductCipher() {
+    }
 
     public static void main(String[] args) {
         try (Scanner sc = new Scanner(System.in)) {

src/main/java/com/thealgorithms/ciphers/a5/Utils.java

@@ -7,7 +7,9 @@ package com.thealgorithms.ciphers.a5;
 
 import java.util.BitSet;
 
-public class Utils {
+public final class Utils {
+    private Utils() {
+    }
 
     public static boolean increment(BitSet bits, int size) {
         int i = size - 1;