Simple SQLite in java connection sample

Connection.java

import static java.lang.Class.forName;
import static java.sql.DriverManager.getConnection;
import java.sql.*;
import java.util.*;

public class db {

    private static final String JDBC_DRIVER;
    private static final String DATABASE_URL;

    static {
        JDBC_DRIVER = "org.sqlite.JDBC";
        DATABASE_URL = "jdbc:sqlite:databasename.db";
    }
    private Connection con;
    private Statement stmt;

    public void db() {
      //CREATE TABLE Users (id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, username VARCHAR(55) UNIQUE, password VARCHAR(55), division VARCHAR(55))
        if (Update("CREATE TABLE Users "
                + "(id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, username VARCHAR(55) UNIQUE, "
                + "password VARCHAR(55), division VARCHAR(55));")) {
            Update("INSERT INTO Users (id, username, password, division) \n"
                    + "	VALUES (NULL, 'anUser', 'apassword', 'division');");
        }
    }

    /**
     * @return Created Connection DB
     */
    public Connection java_db() {
        Connection connect;
        try {
            forName(JDBC_DRIVER);
            connect = getConnection(DATABASE_URL);
        } catch (SQLException | ClassNotFoundException se) {
            connect = null;
            System.out.println(se.getMessage());
        }
        return connect;
    }
  
      public boolean Update(String Query) {
        try {
            con = java_db();
            Query = Query.replaceAll("`", "\"");
            System.out.println(Query);
            stmt = con.createStatement();
            stmt.executeUpdate(Query);
            return true;
        } catch (SQLException ex) {
            return false;
        } finally {
            try {
                if (stmt != null) {
                    stmt.close();
                }
            } catch (SQLException ignored) {
            }
            try {
                if (con != null) {
                    con.close();
                }
            } catch (SQLException se) {
                se.printStackTrace();
            }//end finally try
        }
    }
}