JavaDoc added

converter-sbml/src/main/java/lcsb/mapviewer/converter/model/sbml/NotesUtility.java

 package lcsb.mapviewer.converter.model.sbml;
-
 import javax.xml.stream.XMLStreamException;
 
 import org.apache.commons.lang3.StringEscapeUtils;
@@ -7,7 +6,24 @@ import org.sbml.jsbml.AbstractNamedSBase;
 
 import lcsb.mapviewer.converter.InvalidInputDataExecption;
 
+/**
+ * This utility class parses notes from SBML node and prepares escaped string
+ * ready to use in SBML.
+ * 
+ * @author Piotr Gawron
+ *
+ */
 public class NotesUtility {
+
+  /**
+   * Extract notes from SBML node
+   * 
+   * @param sbmlElement
+   *          SBML node
+   * @return notes
+   * @throws InvalidInputDataExecption
+   *           thrown when there is problem with extracting notes
+   */
   public static String extractNotes(AbstractNamedSBase sbmlElement) throws InvalidInputDataExecption {
     String notes = "";
     try {
@@ -29,6 +45,13 @@ public class NotesUtility {
     return notes;
   }
 
+  /**
+   * Prepares escaped xml string with notes.
+   * 
+   * @param notes
+   *          notes to be processed
+   * @return escaped xml string with notes
+   */
   public static String prepareEscapedXmlNotes(String notes) {
     if (notes == null) {
       return "";