new dir layout

src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDExportException.java

@@ -0,0 +1,18 @@
+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);
+    }
+}