jQuery(document).ready(function($) {
    tinymce.create('tinymce.plugins.wpse72394_plugin', {
        init : function(ed, url) {
                // Register command for when button is clicked
                ed.addCommand('BooWP_insert_shortcode', function() {
                    selected = tinyMCE.activeEditor.selection.getContent();

                    if( selected ){
                        //If text is selected when button is clicked
                        //Wrap shortcode around it.
                        content =  '[column2]'+selected+'[/column2]';
                    }else{
                        content =  '[column2]';
                    }

                    tinymce.execCommand('mceInsertContent', false, content);
                });
            ed.addButton('wpse72394_button', {title : 'Insert Column', cmd : 'wpse72394_insert_shortcode', image: url});
        },   
    });

    // Register our TinyMCE plugin
    tinymce.PluginManager.add('wpse72394_button', tinymce.plugins.wpse72394_plugin);
});