Fix errors while generating javadocs

DEVSIX-5807

Autoported commit.
Original commit hash: [9fd916e79]
Manual files:
commons/src/main/java/com/itextpdf/commons/utils/FileUtil.java

Author: Eugene Bochilo

itext/itext.commons/itext/commons/actions/AbstractStatisticsEvent.cs

@@ -35,8 +35,10 @@ public abstract class AbstractStatisticsEvent : AbstractProductITextEvent {
         private static readonly ILogger LOGGER = ITextLogManager.GetLogger(typeof(iText.Commons.Actions.AbstractStatisticsEvent
             ));
 
-        /// <seealso cref="AbstractProductITextEvent.AbstractProductITextEvent(iText.Commons.Actions.Data.ProductData)
-        ///     "/>
+        /// <summary>Creates instance of abstract statistics iText event based on passed product data.</summary>
+        /// <remarks>Creates instance of abstract statistics iText event based on passed product data. Only for internal usage.
+        ///     </remarks>
+        /// <param name="productData">is a description of the product which has generated an event</param>
         protected internal AbstractStatisticsEvent(ProductData productData)
             : base(productData) {
         }
@@ -49,7 +51,7 @@ protected internal AbstractStatisticsEvent(ProductData productData)
         /// <param name="statisticsName">
         /// name of statistics based on which aggregator will be created.
         /// Shall be one of those returned from
-        /// <see>this#getStatisticsNames()</see>
+        /// <see cref="GetStatisticsNames()"/>
         /// </param>
         /// <returns>
         /// new instance of

itext/itext.commons/itext/commons/utils/FileUtil.cs

@@ -164,8 +164,15 @@ public static String GetBaseDirectory() {
             return AppDomain.CurrentDomain.BaseDirectory;
         }
 
+        /// <summary>
         /// Deletes a file and returns whether the operation succeeded.
-        /// Node that only *files* are supported, not directories.
+        /// </summary>
+        /// <remarks>
+        /// Deletes a file and returns whether the operation succeeded.
+        /// Note that only *files* are supported, not directories.
+        /// </remarks>
+        /// <param name="file">file to be deleted</param>
+        /// <returns>true if file was deleted successfully, false otherwise</returns>
         public static bool DeleteFile(FileInfo file) {
             try {
                 file.Delete();
@@ -175,6 +182,11 @@ public static bool DeleteFile(FileInfo file) {
             }
         }
 
+        /// <summary>
+        /// Returns an URL of the parent directory for the resource.
+        /// </summary>
+        /// <param name="url">of resource</param>
+        /// <returns>parent directory path| the same path if a catalog`s url is passed;</returns>
         public static String ParentDirectory(Uri url) {
             return new Uri(url, ".").ToString();
         }