Resolve ""Error: Exercise could not be found..." during resource loading"

Related to #526 (closed)

src/main/java/at/ac/uibk/gitsearch/repository/jpa/PersistenceAuditEventRepository.java

 package at.ac.uibk.gitsearch.repository.jpa;
 
 import at.ac.uibk.gitsearch.domain.PersistentAuditEvent;
+
 import java.time.Instant;
 import java.util.List;
+
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.repository.JpaRepository;