_init.php

$events = new Events($this->wire);
$this->wire('events', $events, true);

Events.php

<?php namespace ProcessWire;

class Events extends PagesType {

    /**
     * Construct the Events manager for the given parent and template
     *
     * @param Template|int|string|array $templates Template object or array of template objects, names or IDs
     * @param int|Page|array $parents Parent ID or array of parent IDs (may also be Page or array of Page objects)
     */
    public function __construct(ProcessWire $wire, $templates = array(), $parents = array()) {
        parent::__construct($wire, $templates, $parents);

        // Make sure we always include the event template and /events/ parent page
        $this->addTemplates("event");
        $this->addParents($this->pages->get("/events/")->id);
    }
}