Kleine cleanups

src/main/java/puzzeltocht/controller/EventController.java

@@ -18,7 +18,7 @@ import java.util.stream.Collectors;
 @RestController
 @RequestMapping("api")
 public class EventController {
-    private EventService eventService;
+    private final EventService eventService;
 
     public EventController(EventService es) {
         this.eventService = es;

src/main/java/puzzeltocht/domain/Location.java

@@ -1,8 +1,8 @@
 package puzzeltocht.domain;
 
 public class Location {
-    private double latitude;
-    private double longitude;
+    private final double latitude;
+    private final double longitude;
 
     public Location(double latitude, double longitude) {
         this.latitude = latitude;

src/main/java/puzzeltocht/domain/Route.java

@@ -6,8 +6,8 @@ import java.util.List;
 import java.util.UUID;
 
 public class Route {
-    private UUID id;
-    private String name;
+    private final UUID id;
+    private final String name;
     private final List<Mission> missions = new ArrayList<>();
 
     public Route(String name) {

src/main/java/puzzeltocht/service/TeamService.java

@@ -11,7 +11,7 @@ import puzzeltocht.domain.Team;
 
 @Service
 public class TeamService {
-    private static Logger LOGGER = LoggerFactory.getLogger(TeamService.class);
+    private static final Logger LOGGER = LoggerFactory.getLogger(TeamService.class);
 
     private final MissionService missionService;