Send 400 instead of 500 when tournament failes to save

src/main/java/nl/connectedit/swiss/controller/TournamentController.java

@@ -13,6 +13,7 @@ import nl.connectedit.swiss.service.*;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
 
+import java.time.format.DateTimeParseException;
 import java.util.List;
 import java.util.Objects;
 
@@ -68,7 +69,7 @@ public class TournamentController {
         Tournament tournament;
         try {
             tournament = tournamentMapper.toEntity(tournamentDto);
-        } catch (NullPointerException e) {
+        } catch (NullPointerException | DateTimeParseException e) {
             return ResponseEntity.badRequest().build();
         }
         return ResponseEntity.ok(tournamentMapper.toDto(tournamentService.saveTournament(tournament)));