Update MaximumElement.java

Author: AbhiramSakha

src/main/java/com/thealgorithms/arrays/MaximumElement.java

@@ -1,5 +1,16 @@
 package com.thealgorithms.arrays;
+
+/**
+ * This class provides a method to find the maximum element in an array.
+ */
 public class MaximumElement {
+
+    /**
+     * Finds the maximum value in the given array.
+     *
+     * @param arr the input array
+     * @return the maximum element in the array
+     */
     public static int findMax(int[] arr) {
         int max = Integer.MIN_VALUE;