Adding Flight and Steward services

core/src/main/java/cz/muni/fi/pa165/core/service/flight/FlightService.java

+package cz.muni.fi.pa165.core.service.flight;
+
+import cz.muni.fi.pa165.core.data.domain.Flight;
+import cz.muni.fi.pa165.core.service.common.BaseService;
+
+public interface FlightService extends BaseService<Flight, Long> {
+
+}

core/src/main/java/cz/muni/fi/pa165/core/service/flight/FlightServiceImpl.java

+package cz.muni.fi.pa165.core.service.flight;
+
+import cz.muni.fi.pa165.core.data.domain.Flight;
+import cz.muni.fi.pa165.core.data.repository.flight.FlightRepository;
+import cz.muni.fi.pa165.core.service.common.BaseServiceImpl;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class FlightServiceImpl extends BaseServiceImpl<Flight, Long> implements FlightService {
+
+    private final FlightRepository flightRepository;
+
+    @Autowired
+    public FlightServiceImpl(FlightRepository flightRepository) {
+        super(flightRepository);
+        this.flightRepository = flightRepository;
+    }
+}

core/src/main/java/cz/muni/fi/pa165/core/service/steward/StewardService.java

+package cz.muni.fi.pa165.core.service.steward;
+
+import cz.muni.fi.pa165.core.data.domain.Steward;
+import cz.muni.fi.pa165.core.service.common.BaseService;
+
+public interface StewardService extends BaseService<Steward, Long> {
+
+}

core/src/main/java/cz/muni/fi/pa165/core/service/steward/StewardServiceImpl.java

+package cz.muni.fi.pa165.core.service.steward;
+
+import cz.muni.fi.pa165.core.data.domain.Steward;
+import cz.muni.fi.pa165.core.data.repository.steward.StewardRepository;
+import cz.muni.fi.pa165.core.service.common.BaseServiceImpl;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class StewardServiceImpl extends BaseServiceImpl<Steward, Long> implements StewardService {
+
+    private final StewardRepository stewardRepository;
+
+    @Autowired
+    public StewardServiceImpl(StewardRepository stewardRepository) {
+        super(stewardRepository);
+        this.stewardRepository = stewardRepository;
+    }
+}