@DataProvider(name = "formFillingData")
public static Object[][] formFillingData() {
   return new Object[][] {
      { "form1_1.xls", "form2_1.xls", "form3_1.xls" },
      { "form1_2.xls", "form2_2.xls", "form3_2.xls" },
   };
}

@Test(dataProvider = "formFillingData", dataProviderClass = FormFillingData.class)
public void FormFillingTest(String form1, String form2, String form3) {
  FormData formData1 = DataFactory.createFormData(form1);
  FormData formData2 = DataFactory.createFormData(form2);
  FormData formData3 = DataFactory.createFormData(form3);
}