diff --git a/lwext4/ext4_xattr.c b/lwext4/ext4_xattr.c
index c8c99c3..c760e2b 100644
--- a/lwext4/ext4_xattr.c
+++ b/lwext4/ext4_xattr.c
@@ -2,12 +2,6 @@
  * Copyright (c) 2015 Grzegorz Kostka (kostka.grzegorz@gmail.com)
  * Copyright (c) 2015 Kaho Ng (ngkaho1234@gmail.com)
  *
- *
- * HelenOS:
- * Copyright (c) 2012 Martin Sucha
- * Copyright (c) 2012 Frantisek Princ
- * All rights reserved.
- *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
diff --git a/lwext4/ext4_xattr.h b/lwext4/ext4_xattr.h
index 00abff8..f03bae3 100644
--- a/lwext4/ext4_xattr.h
+++ b/lwext4/ext4_xattr.h
@@ -1,3 +1,39 @@
+/*
+ * Copyright (c) 2015 Grzegorz Kostka (kostka.grzegorz@gmail.com)
+ * Copyright (c) 2015 Kaho Ng (ngkaho1234@gmail.com)
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup lwext4
+ * @{
+ */
+/**
+ * @file  ext4_xattr.h
+ * @brief Extended Attribute manipulation.
+ */
+
 #ifndef EXT4_XATTR_H_
 #define EXT4_XATTR_H_
 
@@ -30,3 +66,6 @@ char *ext4_extract_xattr_name(char *full_name, size_t full_name_len,
 			      uint8_t *name_index, size_t *name_len);
 
 #endif
+/**
+ * @}
+ */