Lucene 2.0 Index Builder

package org.mywebapp.indexer;

import org.mywebapp.pojos.MyWebAppDAO;
import org.mywebapp.pojos.Entry;
import org.mywebapp.pojos.Category;
import org.mywebapp.index.MyWebAppAnalyzer;

import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.IndexWriter;

import java.util.Iterator;
import java.util.List;

public class IndexBuilder {

    private MyWebAppDAO manager = MyWebAppDAO.getInstance();

    public IndexBuilder() {
        //...
    }

    public void buildIndex() {
        try{
            IndexWriter cWriter = new IndexWriter("/home/mywebapp/categories-index/", new MyWebAppAnalyzer(), true);
            IndexWriter eWriter = new IndexWriter("/home/mywebapp/entries-index/", new MyWebAppAnalyzer(), true);
            Category category = (Category) this.manager.getById(Category.class, 1);

            buildDocs(cWriter, eWriter, category, keywords);

            cWriter.optimize();
            eWriter.optimize();

            cWriter.close();
            eWriter.close();

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private void buildDocs(IndexWriter cWriter, IndexWriter eWriter, Category category, String keywords) {
        String myKeywords = keywords + " " + category.getName();
        Document d = new Document();

        d.add(new Field("id", "" + category.getId(), Field.Store.YES, Field.Index.UN_TOKENIZED));
        d.add(new Field("name", category.getName(), Field.Store.YES, Field.Index.NO));
        d.add(new Field("title", category.getTitle(), Field.Store.YES, Field.Index.NO));
        d.add(new Field("description", category.getDescription(), Field.Store.YES, Field.Index.NO);
        d.add(new Field("keywords", myKeywords, Field.Store.NO, Field.Index.TOKENIZED));
        try {
            cWriter.addDocument(d);
            buildEntryIndexDocs(eWriter, category);
        } catch (Exception e) {
            e.printStackTrace();
            return;
        }
        List tl = this.manager.getCategoriesByRef(category.getId());
        Iterator topIterator = tl.iterator();
        while (topIterator.hasNext()) {
            buildDocs(cWriter, eWriter, (Category) topIterator.next(), myKeywords);
        }
    }

    private void buildEntryIndexDocs(IndexWriter writer, Category category) {
        try {
            List l = this.manager.getEntriesByCategory(category.getId());
            Entry entry;
            Document d;
            Iterator i = l.iterator();
            while (i.hasNext()) {
                entry = (Entry) i.next();
                d = new Document();
                d.add(new Field("id", "" + entry.getId(), Field.Store.YES, Field.Index.UN_TOKENIZED));
                d.add(new Field("url", entry.getUrl(), Field.Store.YES, Field.Index.UN_TOKENIZED));
                d.add(new Field("title", entry.getTitle(), Field.Store.YES, Field.Index.UN_TOKENIZED));
                d.add(new Field("description", entry.getDescription(), Field.Store.YES, Field.Index.NO));
                d.add(new Field("keywords", entry.getKeywords(), Field.Store.YES, Field.Index.TOKENIZED));
                d.add(new Field("category", "" + entry.getCategory(), Field.Store.YES, Field.Index.UN_TOKENIZED));
                writer.addDocument(d);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}