diff --git a/monticore-runtime/src/main/java/de/monticore/antlr4/MCErrorListener.java b/monticore-runtime/src/main/java/de/monticore/antlr4/MCErrorListener.java
index d1a2907a45..c4ea1fd560 100644
--- a/monticore-runtime/src/main/java/de/monticore/antlr4/MCErrorListener.java
+++ b/monticore-runtime/src/main/java/de/monticore/antlr4/MCErrorListener.java
@@ -128,7 +128,7 @@ && containsRule(((Parser) recognizer).getExpectedTokens(), recognizer.getVocabul
     parser.setErrors(true);
   }
 
-  private static List<String> extractNoKeywordTokens(Recognizer<?, ?> recognizer, Set<Map.Entry<Integer, String>> epsilonRules) {
+  protected static List<String> extractNoKeywordTokens(Recognizer<?, ?> recognizer, Set<Map.Entry<Integer, String>> epsilonRules) {
     Pattern nokeywordPattern = Pattern.compile("nokeyword_(.*)_[0-9]*");
     // Turn the next expected rules into a human readable format:
     List<String> noKeywordRules = epsilonRules.stream().map(r -> {
diff --git a/monticore-runtime/src/main/java/de/monticore/generating/templateengine/freemarker/SimpleHashFactory.java b/monticore-runtime/src/main/java/de/monticore/generating/templateengine/freemarker/SimpleHashFactory.java
index 4b1bc86896..5c2a8411f2 100644
--- a/monticore-runtime/src/main/java/de/monticore/generating/templateengine/freemarker/SimpleHashFactory.java
+++ b/monticore-runtime/src/main/java/de/monticore/generating/templateengine/freemarker/SimpleHashFactory.java
@@ -19,19 +19,18 @@
  */
 // STATE SMELL PN
 public class SimpleHashFactory {
-  
+
   private static SimpleHashFactory theInstance;
-  
-  private SimpleHashFactory() {
+
+  SimpleHashFactory() {
+    theInstance = this;
     // use empty logger to suppress default free marker log behaviour
     System.setProperty(Logger.SYSTEM_PROPERTY_NAME_LOGGER_LIBRARY, Logger.LIBRARY_NAME_NONE);
   }
   
   public static SimpleHashFactory getInstance() {
     if (theInstance == null) {
-      synchronized (SimpleHashFactory.class) {
-        theInstance = new SimpleHashFactory();
-      }
+      new SimpleHashFactory();
     }
     return theInstance;
   }
diff --git a/monticore-runtime/src/main/java/de/monticore/generating/templateengine/reporting/artifacts/ReportingNameHelper.java b/monticore-runtime/src/main/java/de/monticore/generating/templateengine/reporting/artifacts/ReportingNameHelper.java
index cd2bdb1b35..807d297463 100644
--- a/monticore-runtime/src/main/java/de/monticore/generating/templateengine/reporting/artifacts/ReportingNameHelper.java
+++ b/monticore-runtime/src/main/java/de/monticore/generating/templateengine/reporting/artifacts/ReportingNameHelper.java
@@ -10,7 +10,7 @@ public class ReportingNameHelper {
   /**
    * Constructor for de.monticore.generating.templateengine.reporting.artifacts.ReportingNameHelper.
    */
-  private ReportingNameHelper() {
+  ReportingNameHelper() {
   }
 
   public static Path getPath(String outputDir, String qualifiedFilename, String fileextension) {
diff --git a/monticore-runtime/src/main/java/de/monticore/generating/templateengine/reporting/commons/StatisticsHandler.java b/monticore-runtime/src/main/java/de/monticore/generating/templateengine/reporting/commons/StatisticsHandler.java
index 21f2600bf7..df5265d123 100644
--- a/monticore-runtime/src/main/java/de/monticore/generating/templateengine/reporting/commons/StatisticsHandler.java
+++ b/monticore-runtime/src/main/java/de/monticore/generating/templateengine/reporting/commons/StatisticsHandler.java
@@ -27,7 +27,7 @@ static ExecutorService getReportSendingExecutorService() {
     return _reportSendingExecutorService;
   }
 
-  private static void sendRequest(URI url, String data, String type) throws IOException, InterruptedException {
+  static void sendRequest(URI url, String data, String type) throws IOException, InterruptedException {
     HttpURLConnection connection = (HttpURLConnection) url.toURL().openConnection();
     connection.setRequestMethod("POST");
     connection.setRequestProperty("STAT_TYPE", type);
diff --git a/monticore-runtime/src/main/java/de/monticore/generating/templateengine/reporting/reporter/DetailedReporter.java b/monticore-runtime/src/main/java/de/monticore/generating/templateengine/reporting/reporter/DetailedReporter.java
index ffdc9c08f3..4879966896 100644
--- a/monticore-runtime/src/main/java/de/monticore/generating/templateengine/reporting/reporter/DetailedReporter.java
+++ b/monticore-runtime/src/main/java/de/monticore/generating/templateengine/reporting/reporter/DetailedReporter.java
@@ -245,7 +245,7 @@ protected static String calculateLine(String value) {
         ReportingConstants.REPORTING_ROW_LENGTH);
   }
   
-  private void reportTemplateAction(ASTNode astNode, String templatename,
+  void reportTemplateAction(ASTNode astNode, String templatename,
       String actionType) {
     String startString = actionType + getLineStart(astNode);
     String line = startString + Layouter.getSpaceString(
diff --git a/monticore-runtime/src/main/java/de/monticore/generating/templateengine/reporting/reporter/StatisticsReporter.java b/monticore-runtime/src/main/java/de/monticore/generating/templateengine/reporting/reporter/StatisticsReporter.java
index 427e0cbfa7..e025cdec2b 100644
--- a/monticore-runtime/src/main/java/de/monticore/generating/templateengine/reporting/reporter/StatisticsReporter.java
+++ b/monticore-runtime/src/main/java/de/monticore/generating/templateengine/reporting/reporter/StatisticsReporter.java
@@ -83,7 +83,7 @@ public void flush(ASTNode ast) {
     closeFile();
   }
 
-  private void putVersion() {
+  void putVersion() {
     try {
       Properties properties = new Properties();
       properties.load(this.getClass().getResourceAsStream("/buildInfo.properties"));
diff --git a/monticore-runtime/src/main/java/de/monticore/io/MontiCoreClassLoader.java b/monticore-runtime/src/main/java/de/monticore/io/MontiCoreClassLoader.java
index c162e7b46b..a53f1c4dfe 100644
--- a/monticore-runtime/src/main/java/de/monticore/io/MontiCoreClassLoader.java
+++ b/monticore-runtime/src/main/java/de/monticore/io/MontiCoreClassLoader.java
@@ -8,7 +8,7 @@
 
 public class MontiCoreClassLoader extends URLClassLoader {
 
-  private final ClassLoader parent;
+  protected final ClassLoader parent;
 
   public MontiCoreClassLoader(URL[] urls) {
     super(urls);
diff --git a/monticore-runtime/src/main/java/de/monticore/io/paths/MCPath.java b/monticore-runtime/src/main/java/de/monticore/io/paths/MCPath.java
index cf9fd8a0b4..4787514b55 100644
--- a/monticore-runtime/src/main/java/de/monticore/io/paths/MCPath.java
+++ b/monticore-runtime/src/main/java/de/monticore/io/paths/MCPath.java
@@ -332,7 +332,7 @@ void invalidateCaches() {
   }
 
   // A List of all file systems opened for jars.
-  private static Map<File, FileSystem> openedJarFileSystems = new HashMap<>();
+  final static Map<File, FileSystem> openedJarFileSystems = new HashMap<>();
 
   public static FileSystem getJarFS(File jar) {
     if(openedJarFileSystems.containsKey(jar)){
diff --git a/monticore-runtime/src/main/java/de/monticore/symboltable/SymbolWithScopeOfUnknownKindDeSer.java b/monticore-runtime/src/main/java/de/monticore/symboltable/SymbolWithScopeOfUnknownKindDeSer.java
index 8073e7a66e..62fdfca8ea 100644
--- a/monticore-runtime/src/main/java/de/monticore/symboltable/SymbolWithScopeOfUnknownKindDeSer.java
+++ b/monticore-runtime/src/main/java/de/monticore/symboltable/SymbolWithScopeOfUnknownKindDeSer.java
@@ -17,8 +17,8 @@
  */
 public class SymbolWithScopeOfUnknownKindDeSer implements ISymbolDeSer<SymbolWithScopeOfUnknownKind, Object> {
 
-  private final IDeSer<?, ?, ?> parent;
-  private final Supplier<IScope> scopeFactory;
+  protected final IDeSer<?, ?, ?> parent;
+  protected final Supplier<IScope> scopeFactory;
 
   /**
    * Creates a new {@code SymbolWithScopeOfUnknownKindDeSer}.
diff --git a/monticore-runtime/src/main/java/de/monticore/symboltable/serialization/JsonPrinter.java b/monticore-runtime/src/main/java/de/monticore/symboltable/serialization/JsonPrinter.java
index f878fdcc24..5a81ac3ad9 100644
--- a/monticore-runtime/src/main/java/de/monticore/symboltable/serialization/JsonPrinter.java
+++ b/monticore-runtime/src/main/java/de/monticore/symboltable/serialization/JsonPrinter.java
@@ -515,7 +515,7 @@ else if (!currElements.isEmpty() && currElements.peek().isJsonObject()) {
     }
   }
 
-  private JsonObject getParentObject() {
+  protected JsonObject getParentObject() {
     if (currElements.isEmpty()) {
       Log.error("0xA0613 JsonPrinter detected an invalid nesting of Json. "
           + "Cannot add a member as the first element of a Json String!");
diff --git a/monticore-runtime/src/main/java/de/monticore/tf/runtime/ValueComparator.java b/monticore-runtime/src/main/java/de/monticore/tf/runtime/ValueComparator.java
index 5273a8cbd5..36a4a2f330 100644
--- a/monticore-runtime/src/main/java/de/monticore/tf/runtime/ValueComparator.java
+++ b/monticore-runtime/src/main/java/de/monticore/tf/runtime/ValueComparator.java
@@ -6,7 +6,7 @@
 
 public class ValueComparator implements Comparator<String> {
   
-  private Map<String, Integer> data = null;
+  protected Map<String, Integer> data = null;
   
   public ValueComparator(Map<String, Integer> data) {
     this.data = data;
diff --git a/monticore-runtime/src/main/java/de/monticore/tf/runtime/matching/ModelTraversal.java b/monticore-runtime/src/main/java/de/monticore/tf/runtime/matching/ModelTraversal.java
index 0a24d9c00a..75bf66de43 100644
--- a/monticore-runtime/src/main/java/de/monticore/tf/runtime/matching/ModelTraversal.java
+++ b/monticore-runtime/src/main/java/de/monticore/tf/runtime/matching/ModelTraversal.java
@@ -13,7 +13,7 @@ public class ModelTraversal<E extends ITraverser> {
   protected Map<ASTNode, ASTNode> parents= new HashMap<>();
   protected Stack<ASTNode> currentparents = new Stack<>();
 
-  private final E traverser;
+  protected final E traverser;
 
   protected ModelTraversal(E traverser) {
     this.traverser = traverser;
diff --git a/monticore-runtime/src/main/java/de/monticore/tf/runtime/matching/ModelTraversalVisitor.java b/monticore-runtime/src/main/java/de/monticore/tf/runtime/matching/ModelTraversalVisitor.java
index 8a98367d8c..919cf7bea1 100644
--- a/monticore-runtime/src/main/java/de/monticore/tf/runtime/matching/ModelTraversalVisitor.java
+++ b/monticore-runtime/src/main/java/de/monticore/tf/runtime/matching/ModelTraversalVisitor.java
@@ -9,7 +9,7 @@
 
 public class ModelTraversalVisitor implements IVisitor {
 
-  private final ModelTraversal<?> modelTraversal;
+  protected final ModelTraversal<?> modelTraversal;
 
   protected ModelTraversalVisitor(
           ModelTraversal<?> modelTraversal) {