Updated MediaWimporter main() : display usage in console and stop

properly without calling System.exit

source/net/yacy/document/importer/MediawikiImporter.java

@@ -750,16 +750,21 @@ public class MediawikiImporter extends Thread implements Importer {
 
 	public static void main(final String[] s) {
 		if (s.length == 0) {
-            ConcurrentLog.info("WIKITRANSLATION", "usage:");
-            ConcurrentLog.info("WIKITRANSLATION", " -index <wikipedia-dump>");
-            ConcurrentLog.info("WIKITRANSLATION", " -read  <start> <len> <idx-file>");
-            ConcurrentLog.info("WIKITRANSLATION", " -find  <title> <wikipedia-dump>");
-            ConcurrentLog.info("WIKITRANSLATION", " -convert <wikipedia-dump-xml.bz2> <convert-target-dir> <url-stub>");
-            System.exit(0);
+			System.out.println("usage:");
+			System.out.println(" -index <wikipedia-dump>");
+			System.out.println(" -read  <start> <len> <idx-file>");
+			System.out.println(" -find  <title> <wikipedia-dump>");
+			System.out.println(" -convert <wikipedia-dump-xml.bz2> <convert-target-dir> <url-stub>");
+			ConcurrentLog.shutdown();
+			return;
 		}
 
+		try {
 			// example:
-        // java -Xmx2000m -cp classes:lib/bzip2.jar de.anomic.tools.mediawikiIndex -convert DATA/HTCACHE/dewiki-20090311-pages-articles.xml.bz2 DATA/SURROGATES/in/ http://de.wikipedia.org/wiki/
+			// java -Xmx2000m -cp classes:lib/bzip2.jar
+			// de.anomic.tools.mediawikiIndex -convert
+			// DATA/HTCACHE/dewiki-20090311-pages-articles.xml.bz2
+			// DATA/SURROGATES/in/ http://de.wikipedia.org/wiki/
 
 			if (s[0].equals("-convert") && s.length > 2) {
 				final File sourcefile = new File(s[1]);
@@ -802,7 +807,9 @@ public class MediawikiImporter extends Thread implements Importer {
 				}
 
 			}
-        System.exit(0);
+		} finally {
+			ConcurrentLog.shutdown();
+		}
 	}
 
 }