preliminary updates

library/src/main/java/org/mustangproject/Invoice.java

@@ -41,6 +41,7 @@ public class Invoice implements IExportableTransaction {
 
 	public Invoice() {
 		ZFItems = new ArrayList<IZUGFeRDExportableItem>();
+		setCurrency("EUR");
 	}
 
 	@Override

library/src/main/java/org/mustangproject/ZUGFeRD/IExportableTransaction.java

@@ -47,7 +47,7 @@ public interface IExportableTransaction {
 	/**
 	 *
 	 *
-	 * @return Code of Document
+	 * @return Code number of Document type, e.g. "380" for invoiceF
 	 */
 	default String getDocumentCode() {
 		return DocumentCodeTypeConstants.INVOICE;

library/src/main/java/org/mustangproject/ZUGFeRD/IZUGFeRDTradeSettlementPayment.java

@@ -43,26 +43,6 @@ public interface IZUGFeRDTradeSettlementPayment extends IZUGFeRDTradeSettlement
 	}
 
 
-	/**
-	 * BLZ of the sender
-	 *
-	 * @return the BLZ code of the recipient sender's bank
-	 */
-	default String getOwnBLZ() {
-		return null;
-	}
-
-
-	/**
-	 * Bank name of the sender
-	 *
-	 * @return the name of the sender's bank
-	 */
-	default String getOwnBankName() {
-		return null;
-	}
-
-
 	/**
 	 * IBAN of the sender
 	 *
@@ -73,25 +53,12 @@ public interface IZUGFeRDTradeSettlementPayment extends IZUGFeRDTradeSettlement
 	}
 
 
-	/**
-	 * IBAN of the sender
-	 *
-	 * @return the Account Number of the invoice sender's bank account
-	 */
-	default String getOwnKto() {
-		return null;
-	}
-	
 	default String getSettlementXML() {
 		String xml = "			<ram:SpecifiedTradeSettlementPaymentMeans>\n"
 				+ "				<ram:TypeCode>42</ram:TypeCode>\n"
 				+ "				<ram:Information>Überweisung</ram:Information>\n"
 				+ "				<ram:PayeePartyCreditorFinancialAccount>\n"
 				+ "					<ram:IBANID>" + XMLTools.encodeXML(getOwnIBAN()) + "</ram:IBANID>\n"; //$NON-NLS-2$
-			if (getOwnKto()!=null) {
-				xml+= "					<ram:ProprietaryID>" + XMLTools.encodeXML(getOwnKto()) + "</ram:ProprietaryID>\n"; //$NON-NLS-2$
-				
-			}
 				xml+= "				</ram:PayeePartyCreditorFinancialAccount>\n"
 				+ "				<ram:PayeeSpecifiedCreditorFinancialInstitution>\n"
 				+ "					<ram:BICID>" + XMLTools.encodeXML(getOwnBIC()) + "</ram:BICID>\n" //$NON-NLS-2$

library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDExporterFromA3.java

@@ -113,6 +113,11 @@ public class ZUGFeRDExporterFromA3 extends XRExporter implements IZUGFeRDExporte
 		return xmlProvider;
 	}
 
+	public ZUGFeRDExporterFromA3 addAdditionalFile(String name, byte[] content) {
+
+		additionalFiles.put(name,content);
+		return this;
+	}
 
 	/***
 	 * internal helper function: get namespace for given zugferd or factur-x version
@@ -512,6 +517,7 @@ public class ZUGFeRDExporterFromA3 extends XRExporter implements IZUGFeRDExporte
 		PDFAttachGenericFile(doc, filename, "Alternative",
 				"Invoice metadata conforming to ZUGFeRD standard (http://www.ferd-net.de/front_content.php?idcat=231&lang=4)",
 				"text/xml", xmlProvider.getXML());
+
 		for (String filenameAdditional : additionalFiles.keySet()) {
 			PDFAttachGenericFile(doc, filenameAdditional, "Supplement", "ZUGFeRD extension/additional data", "text/xml", additionalFiles.get(filenameAdditional));
 		}