Convert string UTF-8 to UTF-16LE golang

utf16.go

const BOM = '\ufffe' //LE. for BE '\ufeff'

func createFile(name string) error {
	var bytes [2]byte
	data := `test string UTF-8`

	file, err := os.Create(name)
	if err != nil {
  		fmt.Errorf("Can't open file. %v", err)
  		return err
	}
	defer file.Close()
	
	bytes[0] = BOM >> 8
	bytes[1] = BOM & 255

	file.Write(bytes[0:])
	runes := utf16.Encode([]rune(data))
	for _, r := range runes {
  		bytes[1] = byte(r >> 8)
  		bytes[0] = byte(r & 255)
  		file.Write(bytes[0:])
	}
	return nil
}