src/main/java/de/vandermeer/execs/Gen_RunScripts.java
protected final int writeFile(String fn, ST st){
		try {
			FileWriter fs = new FileWriter(fn);
			BufferedWriter bw = new BufferedWriter(fs);
			bw.write(st.render());
			bw.close();
		}
		catch (IOException e) {
			e.printStackTrace();
			return -1;
		}
		return 0;
	}
protected final int writeFile(String fn, ST st){
		try {
			FileWriter fs = new FileWriter(fn);
			BufferedWriter bw = new BufferedWriter(fs);
			bw.write(st.render());
			bw.close();
		}
		catch (IOException e) {
			e.printStackTrace();
			return -1;
		}
		return 0;
	}
Writes an ST object to a file.
@param fn file name
@param st ST template
@return 0 on success with configuration loaded, -1 on error with errors printed on standard error