Fix Extra Work Not Saving

src/main/java/nl/tudelft/tam/service/ExtraWorkService.java

@@ -21,6 +21,7 @@ import java.io.IOException;
 import java.nio.file.Path;
 import java.time.LocalDate;
 import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
@@ -335,7 +336,11 @@ public class ExtraWorkService {
 			work.setContractName(line[3]);
 			work.setBaanCode(line[4]);
 			work.setMaxHours(Integer.parseInt(line[5]));
-			work.setDeadline(LocalDate.parse(line[6]));
+			if (line[6] != null && !line[6].isBlank()) {
+				work.setDeadline(LocalDate.parse(line[6], DateTimeFormatter.ofPattern("dd-MM-yyyy")));
+			}
+
+			extraWorkRepository.save(work.apply());
 		}
 	}