Enhance Charges/Allowances with reasonCode.

library/src/test/java/org/mustangproject/ZUGFeRD/IZUGFeRDAllowanceChargeImpl.java

@@ -23,6 +23,7 @@ import java.math.BigDecimal;
 public class IZUGFeRDAllowanceChargeImpl implements IZUGFeRDAllowanceCharge {
 	private BigDecimal totalAmount;
 	private String reason;
+	private String reasonCode;
 	private BigDecimal taxPercent;
 	boolean isCharge=true;
 
@@ -36,6 +37,11 @@ public class IZUGFeRDAllowanceChargeImpl implements IZUGFeRDAllowanceCharge {
 		return reason;
 	}
 
+	@Override
+	public String getReasonCode() {
+		return reasonCode;
+	}
+
 	@Override
 	public BigDecimal getTaxPercent() {
 		return taxPercent;
@@ -61,6 +67,11 @@ public class IZUGFeRDAllowanceChargeImpl implements IZUGFeRDAllowanceCharge {
 		return this;
 	}
 
+	public IZUGFeRDAllowanceChargeImpl setReasonCode(String reasonCode) {
+		this.reasonCode = reasonCode;
+		return this;
+	}
+
 	public IZUGFeRDAllowanceChargeImpl setTaxPercent(BigDecimal taxPercent) {
 		this.taxPercent = taxPercent;
 		return this;