export() produces no output

[jcardali]

The export functionality is meant to be called by a button click from the UI, most of this code is based off of the snippets found here

export() produces no output, or at least I have found no way to identify where the output is, I've hacked around this for now with the code in the try/catch, which does indeed produce a file at the specified location

Any assistance would be very appreciated.

        Button exportBt = new Button("Export", new Button.ClickListener() {
            @Override
            public void buttonClick(Button.ClickEvent event) {
                ExportToExcelUtility<Investment> exportUtility = customExport();
                exportUtility.setSourceUI(UI.getCurrent());
                exportUtility.setResultantExportType(ExportType.XLSX);
                exportUtility.setExportWindow("_blank");
                exportUtility.export();
                //TODO: Find where this is going, verify contents
                System.out.println(exportUtility.getExportExcelConfiguration().getExportFileName());
                try {
                    File f = File.createTempFile("vaadin", ".xlsx", new File("C:\\Users\\test\\Documents\\Mako"));
                    FileOutputStream fos = new FileOutputStream(f);
                    exportUtility.getWorkbook().write(fos);
                } catch (Exception e) {
                    e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
                }
            }
        });