Java CSV Import / Export Implementation

CSVFileHandler.java

import java.io.File;
import java.io.FileWriter;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class CSVFileHandler<T extends CSVFileHandler.CSVSerializable<? extends T>> {
  public interface CSVSerializable<T> {
    String toCSV(char delimiter);
    String getCSVHeader(char delimiter);
    T fromCSV(String[] csv);
  }

  public List<T> read(String fileName, char delimiter, T object) {
    var file = new File(fileName);
    System.out.println("Reading from file: " + file.getAbsolutePath());

    try {
      var scanner = new Scanner(file);
      scanner.nextLine();

      ArrayList<T> objs = new ArrayList<>();
      while (scanner.hasNextLine()) {
        var line = scanner.nextLine();
        System.out.println("Read Line: " + line);
        var values = line.split(String.valueOf(delimiter));
        var newObj = object.fromCSV(values);
        objs.add(newObj);
      }
      return objs;
    } catch (Exception e) {
      e.printStackTrace();
    }

    return null;
  }

  public void write(String fileName, char delimiter, T[] objects) {
    write(fileName, delimiter, List.of(objects));
  }
  public void write(String fileName, char delimiter, List<T> objects) {
    var file = new File(fileName);
    System.out.println("Writing to file: " + file.getAbsolutePath());
    try {
      var writer = new FileWriter(file);

      writer.append(objects.get(0).getCSVHeader(delimiter)).append(System.lineSeparator());

      for (var obj : objects) {
        var values = obj.toCSV(delimiter);
        writer.append(values).append(System.lineSeparator());
      }

      writer.flush();
      writer.close();
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}