diff --git a/resources/AllgemeinTest/Pair.jav b/resources/AllgemeinTest/Pair.jav
index b7c5e7a9b..2340c3116 100644
--- a/resources/AllgemeinTest/Pair.jav
+++ b/resources/AllgemeinTest/Pair.jav
@@ -12,7 +12,7 @@ class Pair<U, T> {
 		ret.b = x.elementAt(1);
 		return ret;
     }
-    
+ /*   
     eq(a, b) {
     	b = a;
     	return a == b;
@@ -22,7 +22,7 @@ class Pair<U, T> {
 		return  eq(p.a, p.b);
 		//return p.a == p.b;
     }
-/*
+
     void m(Pair<?, ?> p, List<? extends Eq> b)
     {
 	//this.compare(p); //1, type incorrect
diff --git a/src/main/java/de/dhbwstuttgart/core/JavaTXCompiler.java b/src/main/java/de/dhbwstuttgart/core/JavaTXCompiler.java
index 0fc6e18ab..5e69546dd 100644
--- a/src/main/java/de/dhbwstuttgart/core/JavaTXCompiler.java
+++ b/src/main/java/de/dhbwstuttgart/core/JavaTXCompiler.java
@@ -56,11 +56,14 @@ import java.io.File;
 import java.io.FileOutputStream;
 import java.io.FileWriter;
 import java.io.IOException;
+import java.io.OutputStreamWriter;
 import java.io.Writer;
 import java.util.*;
 import java.util.function.Function;
 import java.util.stream.Collectors;
 
+import org.apache.commons.io.output.NullOutputStream;
+
 
 public class JavaTXCompiler {
 
@@ -552,11 +555,8 @@ public class JavaTXCompiler {
 		final ConstraintSet<Pair> cons = getConstraints();
 		Set<Set<UnifyPair>> results = new HashSet<>();
 		try {
-			Writer logFile = //new OutputStreamWriter(new NullOutputStream());
-					// new FileWriter(new
-					// File(System.getProperty("user.dir")+"/resources/logFiles/"+"log_"+sourceFiles.keySet().iterator().next().getName()));
-					new FileWriter(new File(System.getProperty("user.dir") + "/logFiles/" + "log_"
-							+ sourceFiles.keySet().iterator().next().getName()));
+			Writer logFile = log ? new FileWriter(new File(System.getProperty("user.dir") + "/logFiles/" + "log_" + sourceFiles.keySet().iterator().next().getName()))
+					             : new OutputStreamWriter(new NullOutputStream());
 			IFiniteClosure finiteClosure = UnifyTypeFactory.generateFC(allClasses, logFile, classLoader);
 			System.out.println(finiteClosure);
 			ConstraintSet<UnifyPair> unifyCons = UnifyTypeFactory.convert(cons);
diff --git a/src/test/java/AllgemeinTest.java b/src/test/java/AllgemeinTest.java
index db7ae1854..727c6de67 100644
--- a/src/test/java/AllgemeinTest.java
+++ b/src/test/java/AllgemeinTest.java
@@ -52,9 +52,9 @@ public class AllgemeinTest {
 		//String className = "VectorNotObject";
 		//String className = "WildcardCaptureConversionTest";
 		//String className = "CaptureConversion";
-		//String className = "Pair";
+		String className = "Pair";
 		//String className = "UseWildcardPair";
-		String className = "Assign";
+		//String className = "Assign";
 		//PL 2019-10-24: genutzt fuer unterschiedliche Tests
 		path = System.getProperty("user.dir")+"/resources/AllgemeinTest/" + className + ".jav";
 		//path = System.getProperty("user.dir")+"/src/test/resources/AllgemeinTest/Overloading_Generics.jav";