StringBuilder builder = new StringBuilder();
    Writer writer = new AppendableWriter(builder);

    writer.write("Hello".toCharArray());
    writer.write(',');
    writer.write(0xBEEF0020); // only lower 16 bits are important
    writer.write("Wo");
    writer.write("Whirled".toCharArray(), 3, 2);
    writer.write("Mad! Mad, I say", 2, 2);

    assertEquals("Hello, World!", builder.toString());
  }

    }

    public static void writeThreadDump(final String file) {
        try (final Writer writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file), Constants.CHARSET_UTF_8))) {
            processThreadDump(s -> {
                try {
                    writer.write(s);
                    writer.write('\n');
                } catch (final IOException e) {
                    throw new IORuntimeException(e);

        }
        try {
            if (writer != null) {
                new MavenToolchainsStaxWriter().write(writer, content);
            } else {
                new MavenToolchainsStaxWriter().write(outputStream, content);
            }
        } catch (Exception e) {
            throw new XmlWriterException("Unable to write toolchains", e);
        }
    }

class AppendableWriter extends Writer {
  private final Appendable target;
  private boolean closed;

  /**
   * Creates a new writer that appends everything it writes to {@code target}.
   *
   * @param target target to which to append output
   */
  AppendableWriter(Appendable target) {
    this.target = checkNotNull(target);
  }

  /*
   * Abstract methods from Writer
   */

  @Override

        }
        try {
            if (writer != null) {
                new MavenToolchainsStaxWriter().write(writer, content);
            } else {
                new MavenToolchainsStaxWriter().write(outputStream, content);
            }
        } catch (Exception e) {
            throw new XmlWriterException("Unable to write toolchains: " + getMessage(e), getLocation(e), e);
        }

    Writer writer = sink.openStream();
    try {
      writer.write(data);
    } finally {
      writer.close();
    }

    assertContainsExpectedString();
  }

  public void testOpenBufferedStream() throws IOException {
    Writer writer = sink.openBufferedStream();
    try {
      writer.write(data);
    } finally {
      writer.close();
    }

        }
        try {
            if (writer != null) {
                new SettingsStaxWriter().write(writer, content);
            } else {
                new SettingsStaxWriter().write(outputStream, content);
            }
        } catch (Exception e) {
            throw new XmlWriterException("Unable to write settings", e);
        }
    }

        }
        try {
            if (writer != null) {
                new SettingsStaxWriter().write(writer, content);
            } else {
                new SettingsStaxWriter().write(outputStream, content);
            }
        } catch (Exception e) {
            throw new XmlWriterException("Unable to write settings: " + getMessage(e), getLocation(e), e);
        }
    }

                                writer.write(hit.getSourceAsString());
                                writer.write("\n");
                            } catch (final IOException e) {
                                throw new IORuntimeException(e);
                            }
                            return true;
                        });
                        writer.flush();
                    }
                });

        }
        try {
            if (writer != null) {
                new MavenStaxWriter().write(writer, content);
            } else if (outputStream != null) {
                new MavenStaxWriter().write(outputStream, content);
            } else {
                try (OutputStream os = Files.newOutputStream(path)) {