diff --git a/src/de/hsmannheim/informatik/name/domain/starwars/R2D2.java b/src/de/hsmannheim/informatik/name/domain/starwars/R2D2.java
index 786aa11..998d0b9 100644
--- a/src/de/hsmannheim/informatik/name/domain/starwars/R2D2.java
+++ b/src/de/hsmannheim/informatik/name/domain/starwars/R2D2.java
@@ -22,9 +22,16 @@ public class R2D2 extends StarWarsRobot {
         return 0 <= id && id <= 9999;
     }
 
+    /**
+     * R2D2 think method sorts numbers with selection sort
+     * @param numbers integer numbers for sorting
+     * @return arrayToSort integer array with numbers sorted in ascending order
+     * @throws RobotException
+     * @throws RobotMagicValueException
+     */
     @Override
-    public int[] think(int[] zahlen) throws RobotException, RobotMagicValueException {
-        int[] arrayToSort = zahlen.clone();
+    public int[] think(int[] numbers) throws RobotException, RobotMagicValueException {
+        int[] arrayToSort = numbers.clone();
         for (int i = 0; i < arrayToSort.length; i++) {
             if (arrayToSort[i] == MAGIC_NUMBER) {
                 throw new RobotMagicValueException(String.format("Appearance of Magic Number: %d", MAGIC_NUMBER), this);