docs: add subpackage tags

src/admin/layout/class-footnotes-layout-engine.php

@@ -19,6 +19,9 @@ require_once plugin_dir_path( dirname( __FILE__ ) ) . 'layout/class-footnotes-la
  * Layout Engine for the administration dashboard.
  *
  * @since  1.5.0
+ *
+ * @package    footnotes
+ * @subpackage admin_layout
  */
 abstract class Footnotes_Layout_Engine {
 

src/admin/layout/class-footnotes-layout-init.php

@@ -12,6 +12,9 @@
  * Handles the Settings interface of the Plugin.
  *
  * @since  1.5.0
+ *
+ * @package    footnotes
+ * @subpackage admin_layout
  */
 class Footnotes_Layout_Init {
 

src/admin/layout/class-footnotes-layout-settings.php

@@ -47,6 +47,9 @@ require_once plugin_dir_path( dirname( __FILE__ ) ) . 'layout/class-footnotes-la
  * Displays and handles all Settings of the Plugin.
  *
  * @since 1.5.0
+ *
+ * @package    footnotes
+ * @subpackage admin_layout
  */
 class Footnotes_Layout_Settings extends Footnotes_Layout_Engine {
 

src/public/widget/class-footnotes-widget-base.php

@@ -17,6 +17,9 @@
  *
  * @author Stefan Herndler
  * @since 1.5.0
+ *
+ * @package    footnotes
+ * @subpackage public_widget
  */
 abstract class Footnotes_Widget_Base extends WP_Widget {
 

src/public/widget/class-footnotes-widget-reference-container.php

@@ -14,6 +14,9 @@ require_once plugin_dir_path( dirname( __FILE__ ) ) . 'widget/class-footnotes-wi
  * Registers a Widget to put the Reference Container to the widget area.
  *
  * @since 1.5.0
+ *
+ * @package    footnotes
+ * @subpackage public_widget
  */
 class Footnotes_Widget_Reference_Container extends Footnotes_Widget_Base {