\version "2.19.25"

mus = \relative {
  \partial 8
  fis'8( |
  g8.) 16 dis4
}
text = \lyricmode { Was -- sers gnug }

\layout {
  \context {
    \Lyrics
    \override LyricText.whiteout-box = ##t
    \override LyricHyphen.whiteout = ##t
  }
}

\score {
  \new StaffGroup <<
    \mus
    \addlyrics \text
    \mus
  >>
}