diff --git a/vipra-cmd/src/main/java/de/vipra/cmd/option/BackupCommand.java b/vipra-cmd/src/main/java/de/vipra/cmd/option/BackupCommand.java
index 5a9b5b2e7db9b53c72852dcbe07b24cad33d7528..d656552d4ba1bf2f84028f6ce61029c359ba7cea 100644
--- a/vipra-cmd/src/main/java/de/vipra/cmd/option/BackupCommand.java
+++ b/vipra-cmd/src/main/java/de/vipra/cmd/option/BackupCommand.java
@@ -20,17 +20,17 @@ public class BackupCommand implements Command {
 	public void run() throws Exception {
 		final Config config = Config.getConfig();
 		final File tmpTarget = FileUtils.getTempFile("vipra-dump");
-		FileUtils.deleteDirectory(tmpTarget);
+		org.apache.commons.io.FileUtils.deleteDirectory(tmpTarget);
 		final Process p = Runtime.getRuntime().exec("mongodump -d " + config.getDatabaseName() + " -h " + config.getDatabaseHost() + " --port "
 				+ config.getDatabasePort() + " -o " + new File(tmpTarget, "db"));
 		p.waitFor();
-		FileUtils.copyDirectory(config.getDataDirectory(), new File(tmpTarget, "fb"));
-		FileUtils.copyDirectory(Config.getGenericConfigDir(), new File(tmpTarget, "config"));
+		org.apache.commons.io.FileUtils.copyDirectory(config.getDataDirectory(), new File(tmpTarget, "fb"));
+		org.apache.commons.io.FileUtils.copyDirectory(Config.getGenericConfigDir(), new File(tmpTarget, "config"));
 		File target = new File(path);
 		if (target.exists() && target.isDirectory())
 			target = new File(target, "vipra-" + new Date().getTime() + ".zip");
 		ZipUtil.pack(tmpTarget, target);
-		FileUtils.deleteDirectory(tmpTarget);
+		org.apache.commons.io.FileUtils.deleteDirectory(tmpTarget);
 	}
 
 	@Override
diff --git a/vipra-cmd/src/main/java/de/vipra/cmd/option/RestoreCommand.java b/vipra-cmd/src/main/java/de/vipra/cmd/option/RestoreCommand.java
index f68f906d1c960c85d1722512155526fc72342f45..df39af43aa8538f6b27c0fbc228e4cb621ecc1d7 100644
--- a/vipra-cmd/src/main/java/de/vipra/cmd/option/RestoreCommand.java
+++ b/vipra-cmd/src/main/java/de/vipra/cmd/option/RestoreCommand.java
@@ -22,15 +22,15 @@ public class RestoreCommand implements Command {
 		if (!zip.isFile())
 			throw new FileNotFoundException(path);
 		final File tmpTarget = FileUtils.getTempFile("vipra-dump");
-		FileUtils.deleteDirectory(tmpTarget);
+		org.apache.commons.io.FileUtils.deleteDirectory(tmpTarget);
 		ZipUtil.unpack(zip, tmpTarget);
 		final Config config = Config.getConfig();
 		final Process p = Runtime.getRuntime().exec("mongorestore --drop -d " + config.getDatabaseName() + " -h " + config.getDatabaseHost()
 				+ " --port " + config.getDatabasePort() + " " + new File(tmpTarget, "db"));
 		p.waitFor();
-		FileUtils.copyDirectory(new File(tmpTarget, "fb"), config.getDataDirectory());
-		FileUtils.copyDirectory(new File(tmpTarget, "config"), Config.getGenericConfigDir());
-		FileUtils.deleteDirectory(tmpTarget);
+		org.apache.commons.io.FileUtils.copyDirectory(new File(tmpTarget, "fb"), config.getDataDirectory());
+		org.apache.commons.io.FileUtils.copyDirectory(new File(tmpTarget, "config"), Config.getGenericConfigDir());
+		org.apache.commons.io.FileUtils.deleteDirectory(tmpTarget);
 	}
 
 	@Override
diff --git a/vipra-util/src/main/java/de/vipra/util/model/TopicModelConfig.java b/vipra-util/src/main/java/de/vipra/util/model/TopicModelConfig.java
index 30f28c73f311d43be35c315a5d05c36deb006d07..dd81dcf62e7dc7fe74c7ef6dcd196c01c7175784 100644
--- a/vipra-util/src/main/java/de/vipra/util/model/TopicModelConfig.java
+++ b/vipra-util/src/main/java/de/vipra/util/model/TopicModelConfig.java
@@ -162,7 +162,7 @@ public class TopicModelConfig implements Serializable {
 		return maxSimilarTopics;
 	}
 
-	public void setMaxSimilarTopics(int maxSimilarTopics) {
+	public void setMaxSimilarTopics(final int maxSimilarTopics) {
 		this.maxSimilarTopics = maxSimilarTopics;
 	}