Program: 137026
Project: 137026
Buggy source:
private void synchronize(){
  final ResourceSet resourceSet=new ResourceSetImpl();
  try {
    final EObject alreadySavedModel=ModelUtils.load(selectedFileObject.toString(),resourceSet);
    Connection connection=null;
    if (alreadySavedModel instanceof Connection) {
      connection=(Connection)alreadySavedModel;
    }
    Connection newConn=null;
    if (connection != null) {
      String dbUrl=JavaSqlFactory.getURL(connection);
      String driverClassName=JavaSqlFactory.getDriverClass(connection);
      EList<EObject> pcObjects=connection.eContents();
      ListIterator<EObject> liEObject=pcObjects.listIterator();
      Properties parameters=new Properties();
      while (liEObject.hasNext()) {
        EObject eo=liEObject.next();
        if (eo instanceof TaggedValue) {
          String tag=((TaggedValue)eo).getTag();
          System.out.print(tag);
          String value=((TaggedValue)eo).getValue();
          System.out.println("String_Node_Str" + value);
          parameters.put(tag,value);
        }
      }
      System.out.println(dbUrl);
      System.out.println(driverClassName);
      DBConnectionParameter dbcp=new DBConnectionParameter();
      dbcp.setName(connection.getName());
      dbcp.setAuthor(MetadataHelper.getAuthor(connection));
      dbcp.setDescription(MetadataHelper.getDescription(connection));
      dbcp.setPurpose(MetadataHelper.getPurpose(connection));
      dbcp.setStatus(MetadataHelper.getDevStatus(connection));
      dbcp.setDriverClassName(driverClassName);
      dbcp.setJdbcUrl(dbUrl);
      dbcp.setParameters(parameters);
      IMetadataConnection metadataConnection=MetadataFillFactory.getDBInstance().fillUIParams(ParameterUtil.toMap(dbcp));
      newConn=MetadataFillFactory.getDBInstance().fillUIConnParams(metadataConnection,null);
    }
    if (newConn == null) {
      log.error(Messages.getString("String_Node_Str",connection == null ? "String_Node_Str" : connection.getName()));
      return;
    }
    IFolder folder=ResourceManager.getConnectionFolder();
    FolderProvider fp=new FolderProvider();
    fp.setFolderResource(folder);
    IFile file2=loadDataProviderAndStructureInMemory(newConn,fp);
    final EObject model2=ModelUtils.load(file2.toString(),resourceSet);
    Map<String,Object> options=new HashMap<String,Object>();
    options.put(MatchOptions.OPTION_IGNORE_XMI_ID,true);
    options.put(MatchOptions.OPTION_SEARCH_WINDOW,500);
    final MatchModel match=MatchService.doMatch(alreadySavedModel,model2,options);
    final DiffModel diff=DiffService.doDiff(match,false);
    EList<UnmatchElement> unMatchedElements=match.getUnmatchedElements();
    for (    Object object : unMatchedElements) {
      UnmatchElement unMatched=(UnmatchElement)object;
      ModelElement modelElt=(ModelElement)unMatched.getElement();
      System.out.println("String_Node_Str" + modelElt.getName());
    }
    @SuppressWarnings("String_Node_Str") EList<DiffElement> ownedElements=diff.getOwnedElements();
    try {
      System.out.println(ModelUtils.serialize(match));
      System.out.println(ModelUtils.serialize(diff));
    }
 catch (    IOException e) {
      log.error(e,e);
    }
    String outputFile="String_Node_Str";
    System.out.println("String_Node_Str" + outputFile + "String_Node_Str");
    final ComparisonResourceSnapshot snapshot=DiffFactory.eINSTANCE.createComparisonResourceSnapshot();
    snapshot.setDate(Calendar.getInstance().getTime());
    snapshot.setMatch(match);
    snapshot.setDiff(diff);
    ModelUtils.save(snapshot,outputFile);
  }
 catch (  IOException e) {
    System.out.print(e.getMessage());
  }
catch (  InterruptedException e) {
    System.out.print(e.getMessage());
    log.error(e,e);
  }
}

Fixed version (ground truth):
private void synchronize(){
  final ResourceSet resourceSet=new ResourceSetImpl();
  try {
    final EObject alreadySavedModel=ModelUtils.load(selectedFileObject.toString(),resourceSet);
    Connection connection=null;
    if (alreadySavedModel instanceof Connection) {
      connection=(Connection)alreadySavedModel;
    }
    Connection newConn=null;
    if (connection != null) {
      String dbUrl=JavaSqlFactory.getURL(connection);
      String driverClassName=JavaSqlFactory.getDriverClass(connection);
      EList<EObject> pcObjects=connection.eContents();
      ListIterator<EObject> liEObject=pcObjects.listIterator();
      Properties parameters=new Properties();
      while (liEObject.hasNext()) {
        EObject eo=liEObject.next();
        if (eo instanceof TaggedValue) {
          String tag=((TaggedValue)eo).getTag();
          System.out.print(tag);
          String value=((TaggedValue)eo).getValue();
          System.out.println("String_Node_Str" + value);
          parameters.put(tag,value);
        }
      }
      System.out.println(dbUrl);
      System.out.println(driverClassName);
      DBConnectionParameter dbcp=new DBConnectionParameter();
      dbcp.setName(connection.getName());
      dbcp.setAuthor(MetadataHelper.getAuthor(connection));
      dbcp.setDescription(MetadataHelper.getDescription(connection));
      dbcp.setPurpose(MetadataHelper.getPurpose(connection));
      dbcp.setStatus(MetadataHelper.getDevStatus(connection));
      dbcp.setDriverClassName(driverClassName);
      dbcp.setJdbcUrl(dbUrl);
      dbcp.setParameters(parameters);
      IMetadataConnection metadataConnection=MetadataFillFactory.getDBInstance(connection).fillUIParams(ParameterUtil.toMap(dbcp));
      newConn=MetadataFillFactory.getDBInstance(connection).fillUIConnParams(metadataConnection,null);
    }
    if (newConn == null) {
      log.error(Messages.getString("String_Node_Str",connection == null ? "String_Node_Str" : connection.getName()));
      return;
    }
    IFolder folder=ResourceManager.getConnectionFolder();
    FolderProvider fp=new FolderProvider();
    fp.setFolderResource(folder);
    IFile file2=loadDataProviderAndStructureInMemory(newConn,fp);
    final EObject model2=ModelUtils.load(file2.toString(),resourceSet);
    Map<String,Object> options=new HashMap<String,Object>();
    options.put(MatchOptions.OPTION_IGNORE_XMI_ID,true);
    options.put(MatchOptions.OPTION_SEARCH_WINDOW,500);
    final MatchModel match=MatchService.doMatch(alreadySavedModel,model2,options);
    final DiffModel diff=DiffService.doDiff(match,false);
    EList<UnmatchElement> unMatchedElements=match.getUnmatchedElements();
    for (    Object object : unMatchedElements) {
      UnmatchElement unMatched=(UnmatchElement)object;
      ModelElement modelElt=(ModelElement)unMatched.getElement();
      System.out.println("String_Node_Str" + modelElt.getName());
    }
    @SuppressWarnings("String_Node_Str") EList<DiffElement> ownedElements=diff.getOwnedElements();
    try {
      System.out.println(ModelUtils.serialize(match));
      System.out.println(ModelUtils.serialize(diff));
    }
 catch (    IOException e) {
      log.error(e,e);
    }
    String outputFile="String_Node_Str";
    System.out.println("String_Node_Str" + outputFile + "String_Node_Str");
    final ComparisonResourceSnapshot snapshot=DiffFactory.eINSTANCE.createComparisonResourceSnapshot();
    snapshot.setDate(Calendar.getInstance().getTime());
    snapshot.setMatch(match);
    snapshot.setDiff(diff);
    ModelUtils.save(snapshot,outputFile);
  }
 catch (  IOException e) {
    System.out.print(e.getMessage());
  }
catch (  InterruptedException e) {
    System.out.print(e.getMessage());
    log.error(e,e);
  }
}