style: enable ModifierOrder in checkstyle (#5132)

* style: enable `ModifierOrder` in checkstyle

* style: remove redundant `final`

Co-authored-by: Piotr Idzik <65706193+vil02@users.noreply.github.com>

---------

Co-authored-by: Maria Paszkiewicz SCC <maria.paszkiewicz@kit.edu>
Co-authored-by: Piotr Idzik <65706193+vil02@users.noreply.github.com>

checkstyle.xml

@@ -147,7 +147,7 @@
 
     <!-- Modifier Checks                                    -->
     <!-- See https://checkstyle.org/checks/modifier/index.html -->
-    <!-- TODO <module name="ModifierOrder"/> -->
+    <module name="ModifierOrder"/>
     <!-- TODO <module name="RedundantModifier"/> -->
 
     <!-- Checks for blocks. You know, those {}'s         -->

src/main/java/com/thealgorithms/bitmanipulation/HighestSetBit.java

@@ -12,7 +12,7 @@ public final class HighestSetBit {
     private HighestSetBit() {
     }
 
-    public final static Optional<Integer> findHighestSetBit(int num) {
+    public static Optional<Integer> findHighestSetBit(int num) {
         if (num < 0) {
             throw new IllegalArgumentException("Input cannot be negative");
         }

src/main/java/com/thealgorithms/others/CountWords.java

@@ -3,7 +3,7 @@ package com.thealgorithms.others;
 /**
  * @author Marcus
  */
-final public class CountWords {
+public final class CountWords {
     private CountWords() {
     }
 

src/main/java/com/thealgorithms/others/EulersFunction.java

@@ -3,7 +3,7 @@ package com.thealgorithms.others;
 /**
  * @brief utility class for <a href="https://en.wikipedia.org/wiki/Euler%27s_totient_function">Euler's totient function</a>
  */
-final public class EulersFunction {
+public final class EulersFunction {
     private EulersFunction() {
     }
 

src/main/java/com/thealgorithms/others/LowestBasePalindrome.java

@@ -6,7 +6,7 @@ import java.util.ArrayList;
  * @brief Class for finding the lowest base in which a given integer is a palindrome.
      cf. https://oeis.org/A016026
  */
-final public class LowestBasePalindrome {
+public final class LowestBasePalindrome {
     private LowestBasePalindrome() {
     }
 

src/main/java/com/thealgorithms/others/SieveOfEratosthenes.java

@@ -5,7 +5,7 @@ import java.util.Arrays;
 /**
  * @brief utility class implementing <a href="https://en.wikipedia.org/wiki/Sieve_of_Eratosthenes">Sieve of Eratosthenes</a>
  */
-final public class SieveOfEratosthenes {
+public final class SieveOfEratosthenes {
     private SieveOfEratosthenes() {
     }
 

src/main/java/com/thealgorithms/others/cn/HammingDistance.java

@@ -1,6 +1,6 @@
 package com.thealgorithms.others.cn;
 
-final public class HammingDistance {
+public final class HammingDistance {
     private HammingDistance() {
     }