begin service structure

src/main/java/de/pnreichmuth/timekeep_backend/exceptions/RacerNotFoundException.java

@@ -0,0 +1,14 @@
+package de.pnreichmuth.timekeep_backend.exceptions;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ResponseStatus;
+
+@Slf4j
+@ResponseStatus(value = HttpStatus.NOT_FOUND, reason = "RACER_NOT_FOUND")
+public class RacerNotFoundException extends RuntimeException {
+    public RacerNotFoundException(String message) {
+        super(message);
+        log.error(message);
+    }
+}

src/main/java/de/pnreichmuth/timekeep_backend/exceptions/TeamExistsException.java

@@ -0,0 +1,15 @@
+package de.pnreichmuth.timekeep_backend.exceptions;
+
+import de.pnreichmuth.timekeep_backend.entities.Team;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ResponseStatus;
+
+@ResponseStatus(value = HttpStatus.CONFLICT, reason = "TEAM_EXISTS")
+@Slf4j
+public class TeamExistsException extends RuntimeException {
+    public TeamExistsException(String message, Team team) {
+        super(message);
+        log.warn(message, team.getTeamName());
+    }
+}

src/main/java/de/pnreichmuth/timekeep_backend/exceptions/TeamNotFoundException.java

@@ -0,0 +1,14 @@
+package de.pnreichmuth.timekeep_backend.exceptions;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ResponseStatus;
+
+@Slf4j
+@ResponseStatus(HttpStatus.NOT_FOUND)
+public class TeamNotFoundException extends RuntimeException {
+    public TeamNotFoundException(String message) {
+        super(message);
+        log.error(message);
+    }
+}