1 files changed, 5 insertions, 3 deletions
diff --git a/includes/view/ShiftCalendarLane.php b/includes/view/ShiftCalendarLane.php
index 774683bd..fd4c6f06 100644
--- a/includes/view/ShiftCalendarLane.php
+++ b/includes/view/ShiftCalendarLane.php
@@ -2,6 +2,8 @@
 
 namespace Engelsystem;
 
+use Exception;
+
 /**
  * Represents a single lane in a shifts calendar.
  */
@@ -38,15 +40,15 @@ class ShiftCalendarLane
      * Returns true on success.
      *
      * @param array $shift The shift to add
-     * @return boolean true on success
+     * @throws Exception if the shift doesn't fit into the lane.
      */
     public function addShift($shift)
     {
         if ($this->shiftFits($shift)) {
             $this->shifts[] = $shift;
-            return true;
+            return;
         }
-        return false;
+        throw new Exception('Unable to add shift to shift calendar lane.');
     }
 
     /**