public static void runWrite() throws FileNotFoundException {
		if (FileReadService.sList.isEmpty()) {
			System.out.println("There is no Student !");
		} else {
			for (int i = 0; i < FileReadService.sList.size(); i++) {
				try {
					// Error : 2nd line.
					if (FileReadService.sList.get(i).getP().equals(null))
						;
				} catch (NullPointerException e) {
					System.out.println("The student "
							+ FileReadService.sList.get(i).displayNames()
							+ " has no Promotion !");
				}
				// Error : 3rd line.
				if (FileReadService.sList.get(i).getGraders().isEmpty()) {
					System.out.println("The student "
							+ FileReadService.sList.get(i).displayNames()
							+ " has no grader !");
					// Error : 4th line.
				} else if (FileReadService.sList.get(i).getMarks().equals(null)) {
					System.out.println("The student "
							+ FileReadService.sList.get(i).displayNames()
							+ " doesn't have marks !");
				} else {
					System.out.println("Choose the path to save (...\\file.csv) :");

					Scanner sc = new Scanner(System.in);
					String filename = sc.nextLine();

					FileWrite fw = null;
					try {
						fw = new FileWrite(filename);
					} catch (IOException e) {
						e.printStackTrace();
					}
					fw.write(filename);
				}
			}
		}
	}