code: public void ENopen( String input, String report, String outputBin ) throws EpanetException {
          int errcode = epanet.ENopen(input, report, outputBin);
          checkError(errcode);
      }
docs: Opens the Toolkit to analyze a particular distribution system.
  
  @param input name of an EPANET Input file.
  @param report name of an output Report file.
  @param outputBin name of an optional binary Output file.
  @throws IOException