Program: 123980
Project: 123980
Buggy source:
/** 
 * @see org.eclipse.jface.wizard.Wizard#performFinish()
 */
@Override public boolean performFinish(){
  if (getContainer().getCurrentPage().equals(manyProjectsPage)) {
    return manyProjectsPage.createProjects();
  }
 else {
    name=mainPage.getName();
    final String technicalName=mainPage.getTechnicalName();
    final String sourcePath=mainPage.getSourcePath();
    final boolean isArchive=mainPage.isArchive();
    updateExternalLibPath();
    WorkspaceModifyOperation op=new WorkspaceModifyOperation(){
      @Override protected void execute(      IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {
        try {
          monitor.beginTask("String_Node_Str",1);
          if (monitor.isCanceled()) {
            throw new OperationCanceledException();
          }
          if (!isArchive) {
            ImportProjectsUtilities.importProjectAs(getShell(),name,technicalName,sourcePath,new SubProgressMonitor(monitor,1));
          }
 else {
            try {
              ImportProjectsUtilities.importArchiveProjectAs(getShell(),name,technicalName,sourcePath,new SubProgressMonitor(monitor,1));
            }
 catch (            TarException e) {
              throw new InvocationTargetException(e,Messages.getString("String_Node_Str"));
            }
catch (            IOException e) {
              throw new InvocationTargetException(e,Messages.getString("String_Node_Str"));
            }
          }
        }
  finally {
          monitor.done();
        }
      }
    }
;
    try {
      getContainer().run(false,true,op);
    }
 catch (    InterruptedException e) {
      return false;
    }
catch (    InvocationTargetException e) {
      Throwable t=e.getTargetException();
      String message=Messages.getString("String_Node_Str");
      IStatus status;
      if (t instanceof CoreException) {
        status=((CoreException)t).getStatus();
      }
 else {
        status=new Status(IStatus.ERROR,IDEWorkbenchPlugin.IDE_WORKBENCH,1,message,t);
      }
      ErrorDialog.openError(getShell(),message,null,status);
      ExceptionHandler.process(e);
      return false;
    }
    return true;
  }
}

Fixed version (ground truth):
/** 
 * @see org.eclipse.jface.wizard.Wizard#performFinish()
 */
@Override public boolean performFinish(){
  if (getContainer().getCurrentPage().equals(manyProjectsPage)) {
    return manyProjectsPage.createProjects();
  }
 else {
    name=mainPage.getName().trim().replace(' ','_');
    final String technicalName=mainPage.getTechnicalName();
    final String sourcePath=mainPage.getSourcePath();
    final boolean isArchive=mainPage.isArchive();
    updateExternalLibPath();
    WorkspaceModifyOperation op=new WorkspaceModifyOperation(){
      @Override protected void execute(      IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {
        try {
          monitor.beginTask("String_Node_Str",1);
          if (monitor.isCanceled()) {
            throw new OperationCanceledException();
          }
          if (!isArchive) {
            ImportProjectsUtilities.importProjectAs(getShell(),name,technicalName,sourcePath,new SubProgressMonitor(monitor,1));
          }
 else {
            try {
              ImportProjectsUtilities.importArchiveProjectAs(getShell(),name,technicalName,sourcePath,new SubProgressMonitor(monitor,1));
            }
 catch (            TarException e) {
              throw new InvocationTargetException(e,Messages.getString("String_Node_Str"));
            }
catch (            IOException e) {
              throw new InvocationTargetException(e,Messages.getString("String_Node_Str"));
            }
          }
        }
  finally {
          monitor.done();
        }
      }
    }
;
    try {
      getContainer().run(false,true,op);
    }
 catch (    InterruptedException e) {
      return false;
    }
catch (    InvocationTargetException e) {
      Throwable t=e.getTargetException();
      String message=Messages.getString("String_Node_Str");
      IStatus status;
      if (t instanceof CoreException) {
        status=((CoreException)t).getStatus();
      }
 else {
        status=new Status(IStatus.ERROR,IDEWorkbenchPlugin.IDE_WORKBENCH,1,message,t);
      }
      ErrorDialog.openError(getShell(),message,null,status);
      ExceptionHandler.process(e);
      return false;
    }
    return true;
  }
}