Syntaxhighlighter evolved footer code

Hello, I am trying to set up SyntaxHighlighter Evolved.

I have noted this advice:

Make sure your theme’s footer.php file has <?php wp_footer(); ?> somewhere inside of it, otherwise the plugin won’t be able to do it’s thing.

My problem is that my theme does not have a footer.php file.

I am using the Genesis sample theme, which has only these two files:
functions.php
style.css

I cannot share a link as I am working locally.

Any advice would be much appreciated 🙂