LicenseFormatMojo updater = new LicenseFormatMojo();
updater.basedir = tmp;
updater.header = "src/test/resources/update/header.txt";
updater.mapping = new HashMap<String, String>() {{put("properties", "SCRIPT_STYLE");}};
updater.project = new MavenProjectStub();
updater.execute();
String test1 = FileUtils.read(new File(tmp, "test1.properties"), System.getProperty("file.encoding"));
String test2 = FileUtils.read(new File(tmp, "test2.properties"), System.getProperty("file.encoding"));
String test3 = FileUtils.read(new File(tmp, "test3.properties"), System.getProperty("file.encoding"));