diff --git a/src/utils.rs b/src/utils.rs
index 647fd66..bd35fd2 100644
--- a/src/utils.rs
+++ b/src/utils.rs
@@ -4,7 +4,10 @@ use std::{
     fs::{self, create_dir_all, File}, io::{self, Write}, ops::Range, path::Path
 };
 
+/// Utility functions for working with BibTeX files.
 pub struct BiblatexUtils;
+
+/// Utility functions for working with files and directories.
 pub struct Utils;
 
 #[derive(Debug)]