diff --git a/mustang/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDExportException.java b/mustang/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDExportException.java
deleted file mode 100644
index 7ac9d643..00000000
--- a/mustang/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDExportException.java
+++ /dev/null
@@ -1,18 +0,0 @@
-package org.mustangproject.ZUGFeRD;
-
-public class ZUGFeRDExportException extends RuntimeException {
-    public ZUGFeRDExportException() {
-    }
-
-    public ZUGFeRDExportException(String message) {
-        super(message);
-    }
-
-    public ZUGFeRDExportException(String message, Throwable cause) {
-        super(message, cause);
-    }
-
-    public ZUGFeRDExportException(Throwable cause) {
-        super(cause);
-    }
-}
diff --git a/mustang/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDExporterFromA1Factory.java b/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDExporterFromA1Factory.java
similarity index 100%
rename from mustang/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDExporterFromA1Factory.java
rename to src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDExporterFromA1Factory.java
diff --git a/mustang/src/main/java/org/mustangproject/ZUGFeRD/model/PDFAConformanceLevel.java b/src/main/java/org/mustangproject/ZUGFeRD/model/PDFAConformanceLevel.java
similarity index 100%
rename from mustang/src/main/java/org/mustangproject/ZUGFeRD/model/PDFAConformanceLevel.java
rename to src/main/java/org/mustangproject/ZUGFeRD/model/PDFAConformanceLevel.java