Java - Work With Files

//package ???

import java.io.*;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author noamn
 */


// I need to read:  https://stackoverflow.com/questions/1625234/how-to-append-text-to-an-existing-file-in-java
public class WorkWithFiles {
    private final static String PathOfUserDetailsFile =
                "C:\\Users\\noamn\\Desktop\\ארבע בשורה\\תוכנית בגאווה\\V0.0.2\\Four In A Line\\src\\Files\\UserNameAndPasswordForLogin.txt";
//            URL url = WorkWithFiles.class.getResource("/Files/UserNameAndPasswordForLogin.txt"); // need utf8
    // See:  https://stackoverflow.com/questions/35132693/set-encoding-as-utf-8-for-a-filewriter




    // write to text file
    // return true if writing succeeded
    public static Boolean writeStringsToTextFile(String... MyStrings) { // params in java
        BufferedWriter bw = null;
        FileWriter fw = null;

        try {
            // this punction also delete the txt file content. to append - add true parameter.
            fw = new FileWriter(PathOfUserDetailsFile);

            bw = new BufferedWriter(fw);
            for (String line : MyStrings) {
                bw.write(line);
                bw.newLine();
            }
        } catch (IOException e) {
            // e.printStackTrace();
            return false;
        } finally {
            try {
                if (bw != null) {
                    bw.close();
                }
                if (fw != null) {
                    fw.close();
                }
            } catch (IOException ex) {
                //ex.printStackTrace();
            }
        }

        return true;
    }



    // The function fill the given Strings-ArrayList with all the lines in the text file
    // return true if reading succeeded
    public static Boolean readStringsFromTextFile(ArrayList<String> OutStrings){
        if (OutStrings == null) return false;


        FileReader fr = null;
        BufferedReader br = null;
        try {
            fr = new FileReader(PathOfUserDetailsFile);
            br = new BufferedReader(fr);

            String line;
            while((line = br.readLine()) != null) {
                OutStrings.add(line);
            }
        } catch (FileNotFoundException e) {
            return false;
        } catch (IOException e) {
            return false;
        }finally {
            try {
                if (br != null) {
                    br.close();
                }
                if (fr != null) {
                    fr.close();
                }
            } catch (IOException ex) {
                //ex.printStackTrace();
            }
        }

        return true;
    }



    // Create a hash password
    // if failed return null
    public static String makeEncryptedPassword(String plainTextPassword){
        if(plainTextPassword == null) return null;
        if(plainTextPassword.length() == 0) return null;

        MessageDigest messageDigest=null;
        try {
            messageDigest = MessageDigest.getInstance("SHA-256");
        } catch (NoSuchAlgorithmException ex) {
            return null;
        }
        messageDigest.update(plainTextPassword.getBytes());
        return new String(messageDigest.digest());
    }



}