change in Method add in Text.java

src/Text.java

@@ -25,6 +25,9 @@ public class Text {
      * @return returns true if the given paragraph exists and is added successfully
      */
     public boolean add(int paragraphNumber, String text) {
+        if(text.length() < 1) {
+            return false;
+        }
         if (paragraphExists(paragraphNumber)) {
             this.text.add((paragraphNumber - 1), text);
             return true;
@@ -39,6 +42,9 @@ public class Text {
      * @return returns true if the paragraph is added successfully
      */
     public boolean add(String text) {
+        if(text.length() < 1) {
+            return false;
+        }
         this.text.add(text.replaceAll("[^A-Za-z0-9 .,:?!\"'-]",""));
         return true;
     }