@Override
    public StandardJavaFileManager getStandardFileManager(
            DiagnosticListener<? super JavaFileObject> diagnosticListener, Locale locale,
            Charset charset) {
        return compiler.getStandardFileManager(diagnosticListener, locale, charset);
    }
SimpleCompiler provides a convenience wrapper of the JavaCompiler interface
with automatic classpath generation

@author tiwe
querydsl-codegen-utils/src/main/java/com/querydsl/codegen/utils/SimpleCompiler.java