__HEADER__(Package to easily print bibliography and image attributions in document)
\RequirePackage{xkeyval}

__LANGUAGE_OPTIONS__

\def__PACKAGE_MACRO__(bibfile){bibliography.bib}
\def__PACKAGE_MACRO__(imagefile){images.bib}
\DeclareOptionX{bibfile}[bibliography.bib]{\def__PACKAGE_MACRO__(bibfile){#1}}
\DeclareOptionX{imagefile}[images.bib]{\def__PACKAGE_MACRO__(imagefile){#1}}

__END_OPTIONS_X__

%%%%Bibliography management
\RequirePackage[backend=biber,style=alphabetic]{biblatex}
\addbibresource{__PACKAGE_MACRO__(bibfile)}
\addbibresource{__PACKAGE_MACRO__(imagefile)}

%Provide simpler commands to properly print image attributions and literature
\DeclareRobustCommand*{\printimageattributions}{
    \def\imageattributionstitle{\ifenglish Image attributions \else Bildquellen\fi}
    \phantomsection
    \addcontentsline{toc}{section}{\imageattributionstitle}
    \printbibliography[title={\imageattributionstitle}, type=image]
}

\DeclareRobustCommand*{\printliterature}{
    \def\literaturetitle{\ifenglish Literature\else Literatur\fi}
    \phantomsection
    \addcontentsline{toc}{section}{\literaturetitle}
    \printbibliography[title={\literaturetitle}, nottype=image]

}