diff --git a/classes/plugins/PubObjectsExportPlugin.php b/classes/plugins/PubObjectsExportPlugin.php
index 2b18e2d99d..989ff80563 100644
--- a/classes/plugins/PubObjectsExportPlugin.php
+++ b/classes/plugins/PubObjectsExportPlugin.php
@@ -22,6 +22,7 @@
 use APP\notification\NotificationManager;
 use APP\server\ServerDAO;
 use APP\template\TemplateManager;
+use Exception;
 use PKP\context\Context;
 use PKP\core\JSONMessage;
 use PKP\db\DAORegistry;
@@ -803,6 +804,14 @@ public function _instantiateSettingsForm($context)
         return $settingsForm;
     }
 
+    /**
+     * Retrieve the form class
+     */
+    public function getSettingsFormClassName()
+    {
+        throw new Exception('Not implemented');
+    }
+
     /**
      * Get the DAOs for objects that need to be augmented with additional settings.
      *
@@ -835,6 +844,26 @@ protected function _checkForExportAction(string $exportAction): bool
 
         return false;
     }
+
+    /**
+     * Get pub ID type
+     *
+     * @return string
+     */
+    public function getPubIdType()
+    {
+        throw new Exception('Not implemented');
+    }
+
+    /**
+     * Get pub ID display type
+     *
+     * @return string
+     */
+    public function getPubIdDisplayType()
+    {
+        throw new Exception('Not implemented');
+    }
 }
 
 if (!PKP_STRICT_MODE) {