changes

src/main/java/lodge/datamodel/AccountReservationList.java

@@ -12,7 +12,7 @@ class AccountReservationList extends ArrayList<IReservation> {
         String serial = String.format("%010d", Math.abs(java.util.Objects.hash(reservation.getPhysical_address())));
         int e = serial.length();
         int s = e - 10;
-        serial = serial.substring(s, e-1);
+        serial = serial.substring(s, e);
         return String.format("R%s", serial);
     }
 

src/main/java/lodge/datamodel/IReservation.java

@@ -1,3 +1,7 @@
+/**
+ * license: GPLv3
+ reservationsystem
+*/
 package lodge.datamodel;
 
 public interface IReservation {