Adding AirplaneRepository

core/src/main/java/cz/muni/fi/pa165/core/data/repository/airplane/AirplaneRepository.java

+package cz.muni.fi.pa165.core.data.repository.airplane;
+
+import cz.muni.fi.pa165.core.data.domain.Airplane;
+import cz.muni.fi.pa165.core.data.repository.common.BaseRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface AirplaneRepository extends BaseRepository<Airplane, Long> {
+    
+}