how do we move val w declaration inside try?

io.scala

  def printFileWriter(name: String): PrintWriter = {
    new PrintWriter(new FileWriter(name))
  }

  def writing[B](fileName: String)(f: PrintWriter => B): B = {
    lazy val w = printFileWriter(fileName) // so throws only in try, if ever
    try { f(w) }
    finally { w.close() }
  }