public void setETag(String eTag) {
        this.eTag = eTag;
    }
Sets the ETag value for the new object that was created from the
associated <code>putObject</code> request.

@param eTag
           The ETag value for the new object.

@see PutObjectResult#getETag()
aws-java-sdk-s3/src/main/java/com/amazonaws/services/s3/model/PutObjectResult.java