Added AssignmentService into javadoc

Signed-off-by: Marcin Woźniak <y0rune@aol.com>

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

@@ -21,14 +21,26 @@ public class AssignmentService {
     public AssignmentService() {
     }
 
+    /*
+     * save
+     * @param assignment which assignment should be save in service
+     */
     public void save(Assignment assignment) {
         this.repo.save(assignment);
     }
 
+    /*
+     * getCommisionAssignments
+     * Return id of the commision
+     */
     public List<Assignment> getCommisionAssignments(Commision com) {
         return this.repo.getByCommision(com.getId());
     }
 
+    /*
+     * getAssignmentsAmmount
+     * Return count assignments ammount
+     */
     public long getAssignmentsAmmount() {
         return this.repo.count();
     }