main.tex

%!TEX program = lualatex
%!TEX encoding = UTF-8 Unicode
\documentclass[ngerman, a4]{scrartcl}

\usepackage{import}

\subimport{./}{preamble.tex}
\subimport{./}{document.tex}

\addbibresource{literature.bib}

\begin{document}
    \input{titlepage.tex}

    \begin{abstract}
        \blindtext \cite{hohmann_attainability_1960}
    \end{abstract}

    \tableofcontents

    \newpage

    \blindmathtrue
    \Blinddocument

    \newpage
    \appendix

    \printbibliography

\end{document}