code: private StringBuilder extractJavaDoc(final String source) {
  		int docStart = source.indexOf("/**");
  		int docEnd = source.indexOf("*/", docStart);
  		int classStart = source.indexOf("public class");
  		int author = source.indexOf("@author");
  		int since = source.indexOf("@since");
  
  		if (classStart == -1) {
  			classStart = docEnd;
  		}
  		if (docEnd == -1 || classStart < docStart) {
  			return new StringBuilder("No JavaDoc provided");
  		}
  		if (author != -1 && author < docEnd) {
  			docEnd = author;
  		}
  		if (since != -1 && since < docEnd) {
  			docEnd = since;
  		}
  
  		return new StringBuilder(source.substring(docStart + 3, docEnd).trim());
  
  	}
docs: extracts the javadoc. It assumes that the java doc for the class is the first javadoc in the file.
  
  @param source string representing the java class.
  @return a String builder containing the javadoc.