added a line of comment in the catch clause of convertIdentifierStringToUuid

java/com.sap.sailing.server.gateway/src/com/sap/sailing/server/gateway/impl/rc/RegattaRaceStatesJsonGetServlet.java

@@ -128,6 +128,7 @@ public class RegattaRaceStatesJsonGetServlet extends AbstractJsonHttpServlet {
                 result = UUID.fromString(identifierToConvert);
             } catch (IllegalArgumentException iae) {
                 logger.warning("The identifier " + identifierToConvert + " could not be converted to a UUID");
+                //in this case null is returned
             }
         }
         return result;