4段階目（BaseDataを作り、EmployeeDataに継承させよう）

em-oop/src/EmployeeData.java

@@ -1,5 +1,5 @@
 
-public class EmployeeData {
+public class EmployeeData extends BaseData {
 	private String idEmployee;
 	private String nmEmployee;
 	private String knEmployee;
@@ -112,4 +112,15 @@ public class EmployeeData {
 		return true;
 	}
 
+	@Override
+	public String toCSV() {
+		return getIdEmployee() + "," + getNmEmployee() + "," + getKnEmployee() + ","
+				+ getMailAddress() + "," + getPassword() + "," + getIdDepartment();
+	}
+
+	@Override
+	public String getPrimaryKeyValue() {
+		return this.idEmployee;
+	}
+
 }