add javadoc

src/main/java/ru/touchin/templates/calendar/CalendarAdapter.java

@@ -174,6 +174,7 @@ public abstract class CalendarAdapter<TDayViewHolder extends RecyclerView.ViewHo
      * Bind data to a Header ViewHolder.
      *
      * @param viewHolder ViewHolder for binding;
+     * @param year       year;
      * @param monthName  Name of month;
      * @param firstMonth True if bind called for the first month in calendar.
      */

src/main/java/ru/touchin/templates/calendar/CalendarHeaderItem.java

@@ -37,6 +37,11 @@ public class CalendarHeaderItem implements CalendarItem {
         this.endRange = endRange;
     }
 
+    /**
+     * Returns year.
+     *
+     * @return year.
+     */
     public int getYear() {
         return year;
     }