# Multiple Tex files result in blank bibliography [closed]

I have read multiple entries on this site for my issue but still cannot make the connection. I have main.tex, Frontmatter.tex, chapter1.tex and want to \input{Frontmatter.tex} and then have main.tex print the bibliography for all files to end the document. All files share the same bibliography (library.bib) How to I get citations from all files to write into one bibliography at the end of the document? main file included here:

\documentclass [12pt]{article}
\usepackage[american]{babel}
\usepackage[utf8]{inputenc}
\usepackage{csquotes}
\usepackage[backend=biber,style=apa,sortcites=true,sorting=nyt]{biblatex}
\DeclareLanguageMapping{american}{american-apa}
\usepackage{setspace}
\usepackage[T1]{fontenc}
\usepackage{mathptmx}
\usepackage{amsmath}
\usepackage{amssymb,amsfonts,textcomp}
\usepackage{array}
\usepackage{hhline}
\usepackage[right=1in,left=1in,top=1in,bottom=1in]{geometry}
\usepackage{tocloft}
\renewcommand{\contentsname}%
}
\title{}
\begin{document}
\input{FrontMatter.tex}
\input{chapter1.tex}
\printbibliography
\end{document}

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## closed as too localized by Marco Daniel, Paulo Cereda, Gonzalo Medina, Joseph Wright♦Aug 19 '12 at 15:52

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What is the problem? That should work assuming you are \cite-ing entries from library.bib in your \input-ed files, and then running latex main.tex, biber main.bcf, latex main.tex. If you are getting an error message on any of those three commands, please add them to your question. –  jon Aug 13 '12 at 17:28
Continuing on @jon 's comment: Try adding \nocite{*} just before \printbibliography, and then process by latex, biber, latex. –  yo' Aug 13 '12 at 19:49
Thank you for your help, I had \end{document} in the bottom of each chapter. It never made it to the \printbibliography command. Thank you for the posting tip, it looked gnarly when I first posted. –  Bob Wainscott Aug 15 '12 at 20:16