diff --git a/OGP1718-Worms/src/worms/model/Worm.java b/OGP1718-Worms/src/worms/model/Worm.java
index ef2a7a8..6ebaf8e 100644
--- a/OGP1718-Worms/src/worms/model/Worm.java
+++ b/OGP1718-Worms/src/worms/model/Worm.java
@@ -27,7 +27,15 @@ public class Worm {
 
     // jumping
     private Tuple<Double, Double> oldLocation;
+    
+    /**
+     * this variable contains the velocity of the jump of the worm
+     */
     private double jumpVelocity;
+    
+    /**
+     * this variable contains the duration of the jump of the worm
+     */
     private double jumpTime;
 
     /**
@@ -152,6 +160,15 @@ public class Worm {
         this.location = location;
     }
 
+    /**
+     * check whether the given location is a valid location for the worm
+     * 
+     * @param location
+     * 		  the location to check
+     * @return True if and only if the location is not equal to null and the coordinates of
+     * 		   the worm are numbers
+     * 		   |result == (location != null) && (!Double.isNaN(location.item1)) && (!Double.isNaN(location.item2))
+     */
     private boolean isValidLocation(Tuple<Double, Double>location) {
         return location != null && !Double.isNaN(location.item1) && !Double.isNaN(location.item2);
     }
@@ -226,6 +243,15 @@ public class Worm {
         setMass(radius);
     }
 
+    /**
+     * check whether the given radius is a valid radius for the worm
+     * 
+     * @param radius
+     * 		  the radius to check
+     * @return True if and only if the radius is bigger then the minimum radius
+     * 	       (or equal) and the radius is a number
+     * 		   |result == (radius >= this.minimumRadius && !Double.isNaN(radius))
+     */
     private boolean isValidRadius(double radius) {
         return radius >= this.minimumRadius && !Double.isNaN(radius);
     }
@@ -239,6 +265,14 @@ public class Worm {
         return this.minimumRadius;
     }
 
+    /**
+     * check whether the given radius is a valid minimum radius for the worm
+     * 
+     * @param radius
+     * 		  the radius to check
+     * @return True if and only if the radius is a number and the radius is bigger then 0
+     * 		   |result == ((!Double.isNaN(radius)) && (radius > 0))
+     */
     private boolean isValidMinimumRadius(double radius) {
         return !Double.isNaN(radius) && radius > 0;
     }
@@ -277,6 +311,10 @@ public class Worm {
     // region ActionPoints
     //===================================================================================
 
+    /**
+     * Return the current action points of the worm
+     * 		the action points identifies the energy of the worm
+     */
     public long getActionPoints() {
         return this.actionPoints;
     }
@@ -285,6 +323,21 @@ public class Worm {
         return this.maxActionPoints;
     }
 
+    /**
+     * set the current points of the worm to the given points
+     *
+     * @param actionPoints
+     * 		  the new points for the worm
+     * @post  if the given points are bigger then the maximum points, the current points
+     * 		  are equal to the maximum points. If the given points are lower then 0
+     * 		  the current points are equal to 0. If the given points is between the
+     * 		  maximum points and 0, the current points is equal to the given points
+     * 		  |if (points > this.maxPoints)
+     *        |		points = this.maxPoints
+     *  	  |else if (points < 0)
+     *        |		points = 0
+     *   	  |this.points = points
+     */
     public void setActionPoints(long actionPoints) {
 
         this.actionPoints = toValidActionPoints(actionPoints);
@@ -306,11 +359,44 @@ public class Worm {
 
         return actionPoints;
     }
-
+    
+    /**
+     * set the maximum of points to the given maximum of points
+     * 
+     * @param maxPoints
+     * 		  the new maximum of points for the worm
+     * @post  the new maximum points is set to the given maximum points (as an integer)
+     * 		  |this.maxPoints = (int) ceil(maxPoints)
+     * @post  when the maximum points change, the current points should change too
+     * 		  |setPoints(this.points)
+     */
+    private void setMaxPoints(double maxPoints) {
+        this.maxActionPoints = (int) ceil(maxPoints);
+        setActionPoints(this.actionPoints);
+    }
+    
+    /**
+     * substract the current points of the worm
+     * 
+     * @param value
+     * 		  the value which should be substracted
+     * @post  the current points are set to the old current points minus the given value
+     * 		  |setPoints(this.points - value)
+     */
     private void subtractActionPoints (long value) {
 
         setActionPoints(this.actionPoints - value);
     }
+    
+    /**
+     * substract the current points of the worm
+     * 
+     * @param angle
+     * 		  the angle needed to calculate the new current points
+     * @post  the current points are set to the old current points minus
+     * 		  the angle (in degrees) divided by 6
+     * 		  |setPoints(this.points - (int) ceil(toDegrees(angle) / 6))
+     */
     private void subtractActionPoints (double angle) {
 
         setActionPoints(this.actionPoints - (long) ceil(toDegrees(angle) / 6));