Connection conn = null;
try {
    // db parameters
    String url       = "jdbc:mysql://localhost:3306/mysqljdbc";
    String user      = "root";
    String password  = "secret";

    // create a connection to the database
    conn = DriverManager.getConnection(url, user, password);
    // more processing here
    // ...
} catch(SQLException e) {
   System.out.println(e.getMessage());
} finally {
    try{
           if(conn ! null)
             conn.close()
    }catch(SQLException ex){
           System.out.println(ex.getMessage())
    }
}