public void setStoreTaskFailureReason(String storeTaskFailureReason) {
        this.storeTaskFailureReason = storeTaskFailureReason;
    }
<p>
If the tasks fails, the reason for the failure is returned. If the task succeeds, <code>null</code> is returned.
</p>

@param storeTaskFailureReason
       If the tasks fails, the reason for the failure is returned. If the task succeeds, <code>null</code> is
       returned.
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/StoreImageTaskResult.java