Finished that file name swap.

diff --git a/PrinterAbstract1.php b/PrinterAbstract.php
similarity index 100%
rename from PrinterAbstract1.php
rename to PrinterAbstract.php

diff --git a/PrinterElement1.php b/PrinterElement.php
similarity index 100%
rename from PrinterElement1.php
rename to PrinterElement.php