Fix checkstyle violations

Author: AHVSSATHVIK

src/main/java/com/thealgorithms/matrix/Search2DMatrix.java

@@ -1,11 +1,23 @@
 package com.thealgorithms.matrix;
 
 /**
- * Search a 2D Matrix
+ * Search a 2D Matrix.
  * Reference: https://leetcode.com/problems/search-a-2d-matrix/
  */
 public class Search2DMatrix {
 
+    // Private constructor to satisfy Checkstyle utility class rule
+    private Search2DMatrix() {
+        throw new UnsupportedOperationException("Utility class");
+    }
+
+    /**
+     * Performs binary search on a 2D matrix.
+     *
+     * @param matrix the 2D matrix
+     * @param target the value to search
+     * @return true if found, false otherwise
+     */
     public static boolean searchMatrix(int[][] matrix, int target) {
         if (matrix == null || matrix.length == 0 || matrix[0].length == 0) {
             return false;
@@ -20,11 +32,15 @@ public static boolean searchMatrix(int[][] matrix, int target) {
             int mid = (left + right) / 2;
             int midValue = matrix[mid / cols][mid % cols];
 
-            if (midValue == target) return true;
-            else if (midValue < target) left = mid + 1;
-            else right = mid - 1;
+            if (midValue == target) {
+                return true;
+            } else if (midValue < target) {
+                left = mid + 1;
+            } else {
+                right = mid - 1;
+            }
         }
+
         return false;
     }
 }
-