diff --git a/src/edu/kit/informatik/model/Train.java b/src/edu/kit/informatik/model/Train.java
index fecbe56..3212324 100644
--- a/src/edu/kit/informatik/model/Train.java
+++ b/src/edu/kit/informatik/model/Train.java
@@ -16,7 +16,7 @@ import java.util.stream.Collectors;
  * @author Arne Keller
  * @version 1.1
  */
-public final class Train implements Comparable {
+public final class Train implements Comparable<Train> {
     /**
      * Separator between rolling stocks in {@link #show()}.
      */
@@ -370,7 +370,7 @@ public final class Train implements Comparable {
     }
 
     @Override
-    public int compareTo(Object o) {
-        return Integer.compare(this.identifier, ((Train) o).identifier);
+    public int compareTo(Train other) {
+        return Integer.compare(this.identifier, other.identifier);
     }
 }