public FileFormat(String name,String mimeType,Charset charset,Collection<String> fileExtensions){
  this(name,Arrays.asList(mimeType),charset,fileExtensions);
}

public FileFormat ( String name , String mimeType , Charset charset , Collection < String > fileExtensions ) { this ( name , Arrays . asList ( mimeType ) , charset , fileExtensions ) ; }
creates a new fileformat object .
