--- /dev/null
+/**
+ * Implements hook_file_insert().
+ */
+function {{ machine_name }}_file_insert($file) {
+ // Add a message to the log, if the file is a jpg
+ $validate = file_validate_extensions($file, 'jpg');
+ if (empty($validate)) {
+ watchdog('file', 'A jpg has been added.');
+ }
+}