Merge two lists in Java

import java.util.ArrayList;
import java.util.List;

public class MergeLists {
   /**
   * This method merge two lists.
   * @param listOne first list to merge.
   * @param listTwo second list to merge.
   * @return List Obtains the merge of listOne and listTwo.
   */   
   public List<String> mergeLists(List<String> listOne, List<String> listTwo) {
       //Variable to store the total sum
       List<String> mergedList = new ArrayList<String>();
       //Sum the two numbers
       mergedList.addAll(listOne);
       mergedList.addAll(listTwo);
       //Return the total
       return mergedList;
   }

   /**
   * One Example
   */
   public static void main(String args[]) throws IOException {

      MergeLists  mergeLists= new MergeLists ();
      //Example
      List<String> listOne = new ArrayList<String>();
      listOne.add("one");
      listOne.add("two");
      listOne.add("three");

      List<String> listTwo = new ArrayList<String>();
      listTwo.add("four");
      listTwo.add("five");

      List<String> mergedList = mergeLists.mergeLists(listOne, listTwo);

      //Output
      System.out.println("Merged List :" + mergedList); //one, two, three, four, five
   }
}