An app that lets you save and try different file naming schemes

My work constantly creates documents in the format:<br><br>"MF123456789_Tender File_VendorName_ContractNumber"<br><br>We usually have to generate these names by hand for each contract or tender. Would be nice if you could save a naming format in an app and just input the variables. <br><br>Sort of like a mail merge thing. <br><br><br>App name is "FileNamer"