diff --git a/src/edu/kit/informatik/model/FreightCoach.java b/src/edu/kit/informatik/model/FreightCoach.java
index 0416d77..a8d8cfc 100644
--- a/src/edu/kit/informatik/model/FreightCoach.java
+++ b/src/edu/kit/informatik/model/FreightCoach.java
@@ -22,7 +22,8 @@ public class FreightCoach extends Coach {
      * @param couplingBack  whether the coach should have a back coupling
      * @throws InvalidInputException on invalid user input (zero-sized coach)
      */
-    public FreightCoach(int identifier, int length, boolean couplingFront, boolean couplingBack) throws InvalidInputException {
+    public FreightCoach(int identifier, int length, boolean couplingFront, boolean couplingBack)
+            throws InvalidInputException {
         super(identifier, length, couplingFront, couplingBack);
     }
 
diff --git a/src/edu/kit/informatik/model/ModelRailwaySimulation.java b/src/edu/kit/informatik/model/ModelRailwaySimulation.java
index 6beb4bf..dad613a 100644
--- a/src/edu/kit/informatik/model/ModelRailwaySimulation.java
+++ b/src/edu/kit/informatik/model/ModelRailwaySimulation.java
@@ -166,6 +166,8 @@ public class ModelRailwaySimulation {
             case SPECIAL:
                 coaches.put(id, new SpecialCoach(id, length, couplingFront, couplingBack));
                 break;
+            default:
+                throw new IllegalArgumentException("coach type is null");
         }
         return id;
     }
@@ -191,7 +193,7 @@ public class ModelRailwaySimulation {
             Terminal.printLine("No coach exists");
         } else {
             coach: for (Integer identifier : coaches.keySet().stream().sorted().collect(Collectors.toList())) {
-            Coach coach = coaches.get(identifier);
+                Coach coach = coaches.get(identifier);
                 for (Train train : trains.values()) {
                     if (train.contains(coach)) {
                         Terminal.printLine(String.format("%d %s %s %d %b %b",
diff --git a/src/edu/kit/informatik/model/PassengerCoach.java b/src/edu/kit/informatik/model/PassengerCoach.java
index d18565c..57981ee 100644
--- a/src/edu/kit/informatik/model/PassengerCoach.java
+++ b/src/edu/kit/informatik/model/PassengerCoach.java
@@ -23,7 +23,8 @@ public class PassengerCoach extends Coach {
      * @param couplingBack  whether the coach should have a back coupling
      * @throws InvalidInputException on invalid user input (zero-sized coach)
      */
-    public PassengerCoach(int identifier, int length, boolean couplingFront, boolean couplingBack) throws InvalidInputException {
+    public PassengerCoach(int identifier, int length, boolean couplingFront, boolean couplingBack)
+            throws InvalidInputException {
         super(identifier, length, couplingFront, couplingBack);
     }
 
diff --git a/src/edu/kit/informatik/model/SpecialCoach.java b/src/edu/kit/informatik/model/SpecialCoach.java
index 99de4fb..8d2f80c 100644
--- a/src/edu/kit/informatik/model/SpecialCoach.java
+++ b/src/edu/kit/informatik/model/SpecialCoach.java
@@ -24,7 +24,8 @@ public class SpecialCoach extends Coach {
      * @param couplingBack  whether the coach should have a back coupling
      * @throws InvalidInputException on invalid user input (zero-sized coach)
      */
-    public SpecialCoach(int identifier, int length, boolean couplingFront, boolean couplingBack) throws InvalidInputException {
+    public SpecialCoach(int identifier, int length, boolean couplingFront, boolean couplingBack)
+            throws InvalidInputException {
         super(identifier, length, couplingFront, couplingBack);
     }