\begin{tikzpicture}
\umlstateinitial[name=initial]
\umlstatefinal[x=4, y=-2, name=final]
\umlHVtrans[arg=transition1, pos=0.5]{initial}{final}
\umlHVHtrans[arm1=-2cm, arg=transition2, pos=1.5]{initial}{final}
\end{tikzpicture}