Read Static data from Document Salesforce

Suppose we would like to read static data we would prefer Custom Settings.
What if we have a data more than 255 characters. We can read it from Document as below.

/**
* @description Document helper.
*/
public class DocumentHelper {

 private static List<Document> documentList;


 /**
 * @name getQueryDocument
 * @description Get Query from Document by Name.
 * @param docName Document Name
 * @return String
 */
 public static String getQueryFromDocument(String docName) {
  getQueryDocumentList();

  for (Document document : documentList) {
   if (document.Name == docName) {
    return document.Body.toString();
   }
  }
  return '';
 }


 /**
 * @name getQueryDocumentList
 * @description Get Documents form Queries Folder.
 * @return void
 */
 private static void getQueryDocumentList() {
  if (documentList == null) {
   documentList = [
     SELECT Name, Body
     FROM Document
     WHERE Folder.Name = 'Queries'];
  }
 }
}