--- /dev/null
+<?php
+
+namespace Drupal\filter;
+
+use Drupal\Core\Form\FormStateInterface;
+
+/**
+ * Provides a form for adding a filter format.
+ */
+class FilterFormatAddForm extends FilterFormatFormBase {
+
+ /**
+ * {@inheritdoc}
+ */
+ public function form(array $form, FormStateInterface $form_state) {
+ return parent::form($form, $form_state);
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function submitForm(array &$form, FormStateInterface $form_state) {
+ parent::submitForm($form, $form_state);
+ drupal_set_message($this->t('Added text format %format.', ['%format' => $this->entity->label()]));
+ return $this->entity;
+ }
+
+}