checkstyle corrections

Former-commit-id: 982cd5df66cc4b41e73deddd7e1ae749a2cb955e

dependency-check-core/src/main/java/org/owasp/dependencycheck/utils/ExtractionUtil.java

@@ -42,6 +42,7 @@ import org.owasp.dependencycheck.analyzer.exception.AnalysisException;
 import org.owasp.dependencycheck.analyzer.exception.ArchiveExtractionException;
 
 /**
+ * Set of utilities to extract files from archives.
  *
  * @author Jeremy Long
  */
@@ -74,9 +75,8 @@ public final class ExtractionUtil {
     }
 
     /**
-     * Extracts the contents of an archive into the specified directory. The files are only extracted if they are
-     * supported by the analyzers loaded into the specified engine. If the engine is specified as null then all files
-     * are extracted.
+     * Extracts the contents of an archive into the specified directory. The files are only extracted if they are supported by the
+     * analyzers loaded into the specified engine. If the engine is specified as null then all files are extracted.
      *
      * @param archive an archive file such as a WAR or EAR
      * @param extractTo a directory to extract the contents to
@@ -143,14 +143,10 @@ public final class ExtractionUtil {
     /**
      * Extracts the contents of an archive into the specified directory.
      *
-	 * @param archive
-	 *            an archive file such as a WAR or EAR
-	 * @param destination
-	 *            a directory to extract the contents to
-	 * @param filter
-	 *            determines which files get extracted
-	 * @throws ExtractionException
-	 *             thrown if the archive is not found
+     * @param archive an archive file such as a WAR or EAR
+     * @param destination a directory to extract the contents to
+     * @param filter determines which files get extracted
+     * @throws ExtractionException thrown if the archive is not found
      */
     public static void extractFilesUsingFilter(File archive, File destination,
             FilenameFilter filter) throws ExtractionException {
@@ -185,15 +181,10 @@ public final class ExtractionUtil {
     /**
      * Extracts files from an archive.
      *
-	 * @param input
-	 *            the archive to extract files from
-	 * @param destination
-	 *            the location to write the files too
-	 * @param filter
-	 *            determines which files get extracted
-	 * @throws ArchiveExtractionException
-	 *             thrown if there is an exception extracting files from the
-	 *             archive
+     * @param input the archive to extract files from
+     * @param destination the location to write the files too
+     * @param filter determines which files get extracted
+     * @throws ArchiveExtractionException thrown if there is an exception extracting files from the archive
      */
     private static void extractArchive(ArchiveInputStream input,
             File destination, FilenameFilter filter)
@@ -224,6 +215,15 @@ public final class ExtractionUtil {
         }
     }
 
+    /**
+     * Extracts a file from an archive (input stream) and correctly builds the directory structure.
+     *
+     * @param input the archive input stream
+     * @param destination where to write the file
+     * @param filter the file filter to apply to the files being extracted
+     * @param entry the entry from the archive to extract
+     * @throws ExtractionException thrown if there is an error reading from the archive stream
+     */
     private static void extractFile(ArchiveInputStream input, File destination,
             FilenameFilter filter, ArchiveEntry entry) throws ExtractionException {
         final File file = new File(destination, entry.getName());
@@ -256,6 +256,13 @@ public final class ExtractionUtil {
         }
     }
 
+    /**
+     * Transfers data from one stream to another using a buffer.
+     *
+     * @param input the input stream
+     * @param bos the output stream
+     * @throws IOException thrown if there is an error reading/writing to the streams
+     */
     private static void transferUsingBuffer(InputStream input,
             BufferedOutputStream bos) throws IOException {
         int count;
@@ -266,6 +273,11 @@ public final class ExtractionUtil {
         bos.flush();
     }
 
+    /**
+     * Closes the stream.
+     *
+     * @param stream the stream to close
+     */
     private static void closeStream(Closeable stream) {
         if (stream != null) {
             try {
@@ -276,6 +288,12 @@ public final class ExtractionUtil {
         }
     }
 
+    /**
+     * Ensures the parent path is correctly created on disk so that the file can be extracted to the correct location.
+     *
+     * @param file the file path
+     * @throws ExtractionException thrown if the parent paths could not be created
+     */
     private static void createParentFile(final File file)
             throws ExtractionException {
         final File parent = file.getParentFile();