Primefaces file upload - file without extension - file-upload

Question

I am using Primefaces v6.2.13 to upload a file. Works fine for files with extension, but crashes when trying to upload file without extension.
This is the part of xhtml used to render upload button
<p:fileUpload value="#{addFileController.file}"
mode="simple" skinSimple="true"
rendered="#{!addFileController.uploadDisable}"
label="Choose file"
allowTypes="#{addfileController.allowedTypes}" />
When I choose file, nothing happens, but as soon as I click the upload button, it throws an error, that I am unable to catch in my code, since it first calls some upload mechanism in PrimeFaces and later the code that I wrote.
The error is:
javax.faces.FacesException: File must have an extension
at org.primefaces.util.FileUploadUtils.getValidFilename(FileUploadUtils.java:54)
and the problematic part of the code inside class looks like this
...
String name = FilenameUtils.getName(filename);
String extension = FilenameUtils.EXTENSION_SEPARATOR_STR + FilenameUtils.getExtension(filename);
if (extension.isEmpty()) {
throw new FacesException("File must have an extension");
}
....
}
Any idea how to deal with this? I was thinking about adding some attribute to xhtml to disable uploading files without extension, since I don't want to edit PF source code.