1 files changed, 18 insertions, 1 deletions
diff --git a/src/test/java/ch/fhnw/thga/gradleplugins/FregeDTOBuilder.java b/src/test/java/ch/fhnw/thga/gradleplugins/FregeDTOBuilder.java
index 5c24f10..f4cabbe 100644
--- a/src/test/java/ch/fhnw/thga/gradleplugins/FregeDTOBuilder.java
+++ b/src/test/java/ch/fhnw/thga/gradleplugins/FregeDTOBuilder.java
@@ -1,6 +1,6 @@
 package ch.fhnw.thga.gradleplugins;
 
-public class FregeDTOBuilder implements Builder {
+public final class FregeDTOBuilder implements Builder {
     private String version = "";
     private String release = "";
     private String compilerDownloadDir = "";
@@ -8,6 +8,23 @@ public class FregeDTOBuilder implements Builder {
     private String outputDir = "";
     private String mainModule = "";
 
+    private static volatile FregeDTOBuilder instance;
+
+    private FregeDTOBuilder() {
+    }
+
+    public static FregeDTOBuilder getInstance() {
+        FregeDTOBuilder result = instance;
+        if (result != null) {
+            return result;
+        } else {
+            synchronized (FregeDTOBuilder.class) {
+                return (instance == null) ? new FregeDTOBuilder() : instance;
+            }
+        }
+    }
+
+
     @Override
     public Builder version(String version) {
         this.version = version;