diff --git a/source/de/anomic/tools/tarTools.java b/source/de/anomic/tools/tarTools.java
index 043adf698..18c573635 100644
--- a/source/de/anomic/tools/tarTools.java
+++ b/source/de/anomic/tools/tarTools.java
@@ -89,8 +89,8 @@ public class tarTools {
 		}
 		Log.logInfo("UNTAR", "finished");
 	}
-	
-	public static void main(final String args[]){
+	
+	public static void main(final String args[]) {
 		// @arg0 source
 		// @arg1 destination
 		if(args.length == 2){
@@ -103,4 +103,4 @@ public class tarTools {
 			System.out.println("usage: <source> <destination>");
 		}
 	}
-}
\ No newline at end of file
+}
diff --git a/source/net/yacy/cora/document/Classification.java b/source/net/yacy/cora/document/Classification.java
index f0caad698..8f81ff04f 100644
--- a/source/net/yacy/cora/document/Classification.java
+++ b/source/net/yacy/cora/document/Classification.java
@@ -129,7 +129,7 @@ public class Classification {
         return appsExtSet.contains(appsExt.trim().toLowerCase());
     }
 
-    public static ContentDomain getContentDomain(String ext) {
+    public static ContentDomain getContentDomain(final String ext) {
         if (isTextExtension(ext)) return ContentDomain.TEXT;
         if (isImageExtension(ext)) return ContentDomain.IMAGE;
         if (isAudioExtension(ext)) return ContentDomain.AUDIO;
diff --git a/source/net/yacy/search/index/DocumentMetadata.java b/source/net/yacy/search/index/DocumentMetadata.java
index b3cce470b..cefeb8359 100644
--- a/source/net/yacy/search/index/DocumentMetadata.java
+++ b/source/net/yacy/search/index/DocumentMetadata.java
@@ -62,37 +62,37 @@ public class DocumentMetadata implements Metadata {
 	}
 
 	@Override
-	public URIMetadata load(Element<WordReference> obrwi) {
+	public URIMetadata load(final Element<WordReference> obrwi) {
 		// TODO Auto-generated method stub
 		return null;
 	}
 
 	@Override
-	public URIMetadata load(byte[] urlHash) {
+	public URIMetadata load(final byte[] urlHash) {
 		// TODO Auto-generated method stub
 		return null;
 	}
 
 	@Override
-	public void store(URIMetadata entry) throws IOException {
+	public void store(final URIMetadata entry) throws IOException {
 		// TODO Auto-generated method stub
 		
 	}
 
 	@Override
-	public boolean remove(byte[] urlHashBytes) {
+	public boolean remove(final byte[] urlHashBytes) {
 		// TODO Auto-generated method stub
 		return false;
 	}
 
 	@Override
-	public boolean exists(byte[] urlHash) {
+	public boolean exists(final byte[] urlHash) {
 		// TODO Auto-generated method stub
 		return false;
 	}
 
 	@Override
-	public CloneableIterator<byte[]> keys(boolean up, byte[] firstKey) {
+	public CloneableIterator<byte[]> keys(final boolean up, final byte[] firstKey) {
 		// TODO Auto-generated method stub
 		return null;
 	}
@@ -104,14 +104,14 @@ public class DocumentMetadata implements Metadata {
 	}
 
 	@Override
-	public CloneableIterator<URIMetadata> entries(boolean up, String firstHash)
+	public CloneableIterator<URIMetadata> entries(final boolean up, final String firstHash)
 			throws IOException {
 		// TODO Auto-generated method stub
 		return null;
 	}
 
 	@Override
-	public int deleteDomain(String hosthash) throws IOException {
+	public int deleteDomain(final String hosthash) throws IOException {
 		// TODO Auto-generated method stub
 		return 0;
 	}