Trouble inserting data into SQLite database. Can't get a connection to the database. Why isn't it working?

Question

I created a program with a few lines of code after getting some advice her on Stackoverflow. My problem is that I can't connect to the database. I get an error called: [SQLITE_ERROR] SQL error or missing database (no such table: PasswordTable).

I created the database via SQLite and also get a successfull connection but cannot insert data. The database in SQLiteManager is called MyDB.sqlite and the table is called PasswordTable ...I am thankful for any help I can get :)

Also: Did I do the implementation of the inner class right? Is this appropriate?

Code is as follows:

import javax.swing.*;
public class Main {

public static void main (String [] args) {

    JFrame frame = new JFrame ();
    frame.setSize(500, 500);
    frame.setResizable(false);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setLocation(700, 300);
    frame.add(new FrameFunctionality ());
    frame.setVisible(true);

}

}

import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;


public class FrameFunctionality extends JPanel {

JLabel label1;
JTextField tf1;
JButton but1;
Database db1;

public FrameFunctionality() {

    setLayout(null);

    //----Add a label to the frame

    label1 = new JLabel("Passwort eingeben:");
    label1.setBounds(10, 20, 150, 40);
    add (label1);

    //-------Add a tf to the frame

    tf1 = new JTextField ();
    tf1.setBounds(10, 50, 150, 40);
    add (tf1);

    //---Add a button to the frame 

    but1 = new JButton ("Save");
    but1.setBounds(10, 100, 100, 50);
    but1.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            db1 = new Database ();
            db1.insertData();

        }
    });

    add (but1);
}

public class Database { //Inner Class

    Connection con = null;
    DriverManager man1 = null;
    PreparedStatement pst = null;

    public Database () {
//------Connect to the database

        try {
            Class.forName("org.sqlite.JDBC");
            con = DriverManager.getConnection("jdbc:sqlite:MyDB.sqlite");
            System.out.println("Connection: Ok!");
        } catch (Exception e) {
            System.out.println("Error1: " + e.getMessage());
        }
    }

//Insert data into the database

    public void insertData () {
        try {
            String query = "INSERT INTO PasswordTable (Passwort) VALUES 
(?)";
            pst = con.prepareStatement(query);
            pst.setString(1, tf1.getText());
            pst.execute();
        }catch (Exception e) {
            System.out.println("Error2: " + e.getMessage());
        }

    }



}



}