killbill-memoizeit

diff --git a/payment/src/main/java/org/killbill/billing/payment/api/DefaultPaymentErrorEvent.java b/payment/src/main/java/org/killbill/billing/payment/api/DefaultPaymentErrorEvent.java
index 82afcb7..d81ebad 100644
--- a/payment/src/main/java/org/killbill/billing/payment/api/DefaultPaymentErrorEvent.java
+++ b/payment/src/main/java/org/killbill/billing/payment/api/DefaultPaymentErrorEvent.java
@@ -74,6 +74,17 @@ public class DefaultPaymentErrorEvent extends BusEventBase implements PaymentErr
     }
 
     @Override
+    public String toString() {
+        final StringBuilder sb = new StringBuilder("DefaultPaymentErrorEvent{");
+        sb.append("message='").append(message).append('\'');
+        sb.append(", accountId=").append(accountId);
+        sb.append(", paymentId=").append(paymentId);
+        sb.append(", transactionType=").append(transactionType);
+        sb.append('}');
+        return sb.toString();
+    }
+
+    @Override
     public boolean equals(final Object o) {
         if (this == o) {
             return true;

diff --git a/util/src/main/java/org/killbill/billing/util/customfield/api/DefaultCustomFieldCreationEvent.java b/util/src/main/java/org/killbill/billing/util/customfield/api/DefaultCustomFieldCreationEvent.java
index 97e131d..a2572b6 100644
--- a/util/src/main/java/org/killbill/billing/util/customfield/api/DefaultCustomFieldCreationEvent.java
+++ b/util/src/main/java/org/killbill/billing/util/customfield/api/DefaultCustomFieldCreationEvent.java
@@ -67,6 +67,16 @@ public class DefaultCustomFieldCreationEvent extends BusEventBase implements Cus
     }
 
     @Override
+    public String toString() {
+        final StringBuilder sb = new StringBuilder("DefaultCustomFieldCreationEvent{");
+        sb.append("customFieldId=").append(customFieldId);
+        sb.append(", objectId=").append(objectId);
+        sb.append(", objectType=").append(objectType);
+        sb.append('}');
+        return sb.toString();
+    }
+
+    @Override
     public boolean equals(final Object o) {
         if (this == o) {
             return true;