/**
 * This generation strategy can be used to generate files on-the-fly. It will create
 * {@link java.io.BufferedWriter}s so that files are written to disk whenever needed. This is the least
 * memory-expansive strategy; however it is not aware of VCSs as it does not check for write access before
 * writing the files. This is not to be used with a project under clearcase for example.
 * 
 * @author <a href="mailto:laurent.goubet@obeo.fr">Laurent Goubet</a>
 * @since 3.0
 */
public class DefaultStrategy extends AbstractGenerationStrategy {

. . .

	@Override
	public AbstractAcceleoWriter createWriterFor(File file, AbstractAcceleoWriter previous, boolean appendMode,
			boolean hasJMergeTags, String charset) throws IOException {
		final AbstractAcceleoWriter writer;
		if (!file.getParentFile().exists()) {
			if (!file.getParentFile().mkdirs()) {
				throw new AcceleoEvaluationException(AcceleoEngineMessages.getString(
						"AcceleoEvaluationContext.FolderCreationError", file.getParentFile())); //$NON-NLS-1$
			}
		}

		if (file.isDirectory()) {
			throw new AcceleoEvaluationException(AcceleoEngineMessages.getString(
					"AcceleoEvaluationContext.FileNameIsDirectory", file)); //$NON-NLS-1$
		}

		boolean fileExisted = file.exists();

		if (appendMode) {  // <-- changed here
			if (charset != null) {
				if (Charset.isSupported(charset)) {
					writer = new GeneratorFileWriter(file, appendMode, charset);
				} else {
					final String message = AcceleoEngineMessages.getString(
							"AcceleoGenerationStrategy.UnsupportedCharset", charset); //$NON-NLS-1$
					AcceleoEnginePlugin.log(message, false);
					writer = new AcceleoFileWriter(file, appendMode);
				}
			} else {
				writer = new GeneratorFileWriter(file, appendMode);
			}
			if (appendMode && fileExisted) {
				writer.append(readLineSeparator(file));
			}
		} else {
			if (charset != null) {
				if (Charset.isSupported(charset)) {
					writer = new GeneratorFileWriter(file.getPath(), hasJMergeTags, charset); // <-- changed here
				} else {
					final String message = AcceleoEngineMessages.getString(
							"AcceleoGenerationStrategy.UnsupportedCharset", charset); //$NON-NLS-1$
					AcceleoEnginePlugin.log(message, false);
					writer = new GeneratorFileWriter(file.getPath(), hasJMergeTags); // <-- changed here
				}
			} else {
				writer = new GeneratorFileWriter(file.getPath(), hasJMergeTags); // <-- changed here
			}
		}
		return writer;
	}
. . .
}