Dutch Stemmer fixed

src/main/java/com/readerbench/services/nlp/stemmer/Stemmer_NL.java

@@ -15,17 +15,25 @@
  */
 package com.readerbench.services.nlp.stemmer;
 
-import org.tartarus.snowball.Among;
-
 /**
  * This class was automatically generated by a Snowball to Java compiler It
  * implements the stemming algorithm defined by a snowball script.
  */
 
-public class Stemmer_NL extends org.tartarus.snowball.SnowballStemmer {
+public class Stemmer_NL extends SnowballProgram {
 	protected static String stemWord(String sir) {
-		methodObject.setCurrent(sir);
-		methodObject.stem();
+		try {
+        methodObject.setCurrent(sir);
+            methodObject.stem();
+        }
+        catch(Exception ex) {
+            System.err.println(ex.getStackTrace());
+            return sir;
+        }
+        catch(Error e) {
+//            System.err.println(e.getStackTrace());
+            return sir;
+        }
 		return methodObject.getCurrent();
 	}