Program: 4619
Project: 4619
Buggy source:
/** 
 * Helper method left from SettingsManager. Sets the directory for saving files. <p><b>Modifies:</b> DIRECTORY_FOR_SAVING_FILES, INCOMPLETE_DIRECTORY,  DOWNLOAD_SNAPSHOT_FILE</p>
 * @param saveDir  A <tt>File</tt> instance denoting theabstract pathname of the directory for saving files.
 * @throws  <tt>IOException</tt>If the directory denoted by the directory pathname String parameter did not exist prior to this method call and could not be created, or if the canonical path could not be retrieved from the file system.
 * @throws  <tt>NullPointerException</tt>If the "dir" parameter is null.
 */
public static final void setSaveDirectory(File saveDir) throws IOException {
  if (saveDir == null)   throw new NullPointerException();
  if (!saveDir.isDirectory()) {
    if (!saveDir.mkdirs())     throw new IOException();
  }
  String parentDir=saveDir.getParent();
  File incDir=new File(parentDir,"String_Node_Str");
  if (!incDir.isDirectory()) {
    if (!incDir.mkdirs())     throw new IOException();
  }
  if (!saveDir.canRead() || !saveDir.canWrite() || !incDir.canRead()|| !incDir.canWrite()) {
    throw new IOException();
  }
  try {
    saveDir=FileUtils.getCanonicalFile(saveDir);
  }
 catch (  IOException ignored) {
  }
  try {
    incDir=FileUtils.getCanonicalFile(incDir);
  }
 catch (  IOException ignored) {
  }
  File snapFile=new File(incDir,"String_Node_Str");
  try {
    snapFile=FileUtils.getCanonicalFile(snapFile);
  }
 catch (  IOException ignored) {
  }
  File snapBackup=new File(incDir,"String_Node_Str");
  try {
    snapBackup=FileUtils.getCanonicalFile(snapBackup);
  }
 catch (  IOException ignored) {
  }
  DIRECTORY_FOR_SAVING_FILES.setValue(saveDir);
  INCOMPLETE_DIRECTORY.setValue(incDir);
  DOWNLOAD_SNAPSHOT_FILE.setValue(snapFile);
  DOWNLOAD_SNAPSHOT_BACKUP_FILE.setValue(snapBackup);
}

Fixed version (ground truth):
/** 
 * Helper method left from SettingsManager. Sets the directory for saving files. <p><b>Modifies:</b> DIRECTORY_FOR_SAVING_FILES, INCOMPLETE_DIRECTORY,  DOWNLOAD_SNAPSHOT_FILE</p>
 * @param saveDir  A <tt>File</tt> instance denoting theabstract pathname of the directory for saving files.
 * @throws  <tt>IOException</tt>If the directory denoted by the directory pathname String parameter did not exist prior to this method call and could not be created, or if the canonical path could not be retrieved from the file system.
 * @throws  <tt>NullPointerException</tt>If the "dir" parameter is null.
 */
public static final void setSaveDirectory(File saveDir) throws IOException {
  if (saveDir == null)   throw new NullPointerException();
  if (!saveDir.isDirectory()) {
    if (!saveDir.mkdirs())     throw new IOException("String_Node_Str");
  }
  String parentDir=saveDir.getParent();
  File incDir=new File(parentDir,"String_Node_Str");
  if (!incDir.isDirectory()) {
    if (!incDir.mkdirs())     throw new IOException("String_Node_Str");
  }
  if (!saveDir.canRead() || !saveDir.canWrite() || !incDir.canRead()|| !incDir.canWrite()) {
    throw new IOException("String_Node_Str");
  }
  try {
    saveDir=FileUtils.getCanonicalFile(saveDir);
  }
 catch (  IOException ignored) {
  }
  try {
    incDir=FileUtils.getCanonicalFile(incDir);
  }
 catch (  IOException ignored) {
  }
  File snapFile=new File(incDir,"String_Node_Str");
  try {
    snapFile=FileUtils.getCanonicalFile(snapFile);
  }
 catch (  IOException ignored) {
  }
  File snapBackup=new File(incDir,"String_Node_Str");
  try {
    snapBackup=FileUtils.getCanonicalFile(snapBackup);
  }
 catch (  IOException ignored) {
  }
  DIRECTORY_FOR_SAVING_FILES.setValue(saveDir);
  INCOMPLETE_DIRECTORY.setValue(incDir);
  DOWNLOAD_SNAPSHOT_FILE.setValue(snapFile);
  DOWNLOAD_SNAPSHOT_BACKUP_FILE.setValue(snapBackup);
}