An Enum of some common MimeTypes feel free to use.

MimeTypes.java

public enum MimeTypes {

  TEXT("text/plain"),
  HTML("text/html"),
  CSS("text/css"),
  JPEG("image/jpeg"),
  PNG("image/png"),
  GIF("image/gif"),
  BMP("image/bmp"),
  WEBP("image/webp"),
  MPEG("audio/mpeg"),
  OGG("audio/ogg"),
  MIDI("audio/midi"),
  WEBM("audio/webm"),
  WAV("audio/wav"),
  MP4("video/mp4"),
  JSON("application/json"),
  JAVASCRIPT("application/javascript"),
  ECMASCRIPT("application/ecmascript"),
  OCTETSTREAM("application/octet-stream"),
  XML("application/xml"),
  XHTMLXML("application/xhtml+xml"),
  VNDMSPowerPoint("application/vnd.mspowerpoint"),
  PDF("application/pdf"),
  SVG("image/svg+xml");

  private String mimeType;

  MimeTypes(String mimeType) {
    this.mimeType = mimeType;
  }

  public String getMimeType() {
    return mimeType;
  }
}