diff --git a/BootstrapAsset.php b/BootstrapAsset.php
index 27dabc0..93f7728 100644
--- a/BootstrapAsset.php
+++ b/BootstrapAsset.php
@@ -10,6 +10,8 @@ namespace yii\bootstrap;
 use yii\web\AssetBundle;
 
 /**
+ * Asset bundle for the Twitter bootstrap css files.
+ *
  * @author Qiang Xue <qiang.xue@gmail.com>
  * @since 2.0
  */
diff --git a/BootstrapPluginAsset.php b/BootstrapPluginAsset.php
index 35bf18a..c451ff4 100644
--- a/BootstrapPluginAsset.php
+++ b/BootstrapPluginAsset.php
@@ -10,6 +10,7 @@ namespace yii\bootstrap;
 use yii\web\AssetBundle;
 
 /**
+ * Asset bundle for the Twitter bootstrap javascript files.
  *
  * @author Qiang Xue <qiang.xue@gmail.com>
  * @since 2.0
diff --git a/BootstrapThemeAsset.php b/BootstrapThemeAsset.php
index f15a0fb..fa424f9 100644
--- a/BootstrapThemeAsset.php
+++ b/BootstrapThemeAsset.php
@@ -10,7 +10,7 @@ namespace yii\bootstrap;
 use yii\web\AssetBundle;
 
 /**
- * Bootstrap 2 theme for Bootstrap 3
+ * Bootstrap 2 theme for Bootstrap 3.
  *
  * @author Alexander Makarov <sam@rmcreative.ru>
  * @since 2.0