private void setIdsToMatchs(Competition competition) {
   Integer idMatch = this.getLastCorrectMatchId();
   for (Match match : competition.getMatchs()) {
     if (match.getId() == null) {
       match.setId(idMatch);
       idMatch++;
     }
   }
 }
 private Integer getLastCorrectMatchId() {
   Integer id = 0;
   Set<Match> matchs = this.getAllMatchs();
   for (Match match : matchs) {
     if (match.getId() > id) {
       id = match.getId();
     }
   }
   id++;
   return id;
 }