diff --git a/src/main/java/de/tum/cit/aet/artemis/exercise/service/ExerciseService.java b/src/main/java/de/tum/cit/aet/artemis/exercise/service/ExerciseService.java
index 291d3e263712..493ae84fa5c8 100644
--- a/src/main/java/de/tum/cit/aet/artemis/exercise/service/ExerciseService.java
+++ b/src/main/java/de/tum/cit/aet/artemis/exercise/service/ExerciseService.java
@@ -835,7 +835,9 @@ public void reconnectCompetencyExerciseLinks(Exercise exercise) {
 
     /**
      * Returns a map from exercise type to count of exercise given a course id.
-     * If a course has no exercises for a specific type, the map contains an entry for that type with value 0.
+     *
+     * @param courseId the course id
+     * @return the mapping from exercise type to course type. If a course has no exercises for a specific type, the map contains an entry for that type with value 0.
      */
     public Map<ExerciseType, Long> countByCourseIdGroupByType(Long courseId) {
         Map<ExerciseType, Long> exerciseTypeCountMap = exerciseRepository.countByCourseIdGroupedByType(courseId).stream()