Buisness logic docs updated

buisnesslogic/src/main/java/com/plannaplan/services/CommisionService.java

@@ -29,6 +29,13 @@ public class CommisionService {
     public CommisionService() {
     }
 
+    /**
+     * save to database commision. It also checks for missing assignments from
+     * previous commision (you can not get rid of accepted assignment)
+     * 
+     * @param commision to save to db
+     * @return Commision instance with id from database
+     */
     public Commision save(Commision commision) {
         Optional<Commision> lastCommision = this.getNewestCommision(commision.getCommisionOwner());
         if (lastCommision.isPresent()) {