Getting error of unexpected output during activation

You have the same username as the plugin author? o.O

The error comes from line 444:
There’s two characters between ?> and the next <?php

Change:

add_action( 'admin_menu','business_hours_menu' );
?>

<?php

add_action( 'widgets_init', 'lordlinus_businesshour_load' );

To:

add_action( 'admin_menu','business_hours_menu' );

add_action( 'widgets_init', 'lordlinus_businesshour_load' );