src/main/java/de/vandermeer/execs/options/ExecS_CliParser.java
public ParseException parse(String[] args){
		ParseException ret = null;
		CommandLineParser parser = new DefaultParser();
		try{
			this.cmdLine = parser.parse(this.options, args);
		}
		catch(ParseException pe){
			ret = pe;
		}
		return ret;
	}
public ParseException parse(String[] args){
		ParseException ret = null;
		CommandLineParser parser = new DefaultParser();
		try{
			this.cmdLine = parser.parse(this.options, args);
		}
		catch(ParseException pe){
			ret = pe;
		}
		return ret;
	}
Parses command line arguments and fills set options.
@param args command line arguments
@return null on success, an exception with message on parsing error