Creating html file based on template in java web application

I am creating a web application and upon user registration I would like to create a html file named by that username (i.e. joebloggs123 is username, therefore the html file is joebloggs123.html). I would like to use a template html file as it will cover basic profile content for the user when created. So far I have the following:

File htmlTemplateFile = new File("/Convocast-war/web/userTemplate.html");
String htmlString = FileUtils.readFileToString(htmlTemplateFile);
String title = username + "'s Profile";
htmlString = htmlString.replace("$title", title);
File newHtmlFile = new File("/userPages/" + username + ".html");
FileUtils.writeStringToFile(newHtmlFile, htmlString);
System.out.println(newHtmlFile);

However I am getting filenotfoundexception on the htmlTemplateFile path. Included is my directory structure but no matter the file path I use it will not find the file. I have tried many other variations but nothing seems to find the file. File Structure