Fix test.

wise-webapp/src/main/java/com/wisemapping/model/Label.java

@@ -73,7 +73,7 @@ public class Label implements Serializable {
         return title;
     }
 
-    public void setTitle(@NotNull String title) {
+    public void setTitle(String title) {
         this.title = title;
     }
 
@@ -85,7 +85,7 @@ public class Label implements Serializable {
         this.id = id;
     }
 
-    @NotNull
+    @Nullable
     public String getColor() {
         return color;
     }

wise-webapp/src/main/java/com/wisemapping/rest/model/RestLabel.java

@@ -30,7 +30,7 @@ public class RestLabel {
         this.label = label;
     }
 
-    public void setParent(@NotNull final Label parent) {
+    public void setParent(final Label parent) {
         this.label.setParent(parent);
     }
 

wise-webapp/src/main/java/com/wisemapping/validator/LabelValidator.java

@@ -55,14 +55,23 @@ public class LabelValidator implements Validator {
         ValidationUtils.rejectIfEmptyOrWhitespace(errors, "title", Messages.FIELD_REQUIRED);
         ValidationUtils.rejectIfEmptyOrWhitespace(errors, "color", Messages.FIELD_REQUIRED);
         final String title = label.getTitle();
+
         ValidatorUtils.rejectIfExceeded(
                 errors,
                 "title",
                 "The description must have less than " + Constants.MAX_LABEL_NAME_LENGTH + " characters.",
                 title,
                 Constants.MAX_LABEL_NAME_LENGTH);
+
+        ValidatorUtils.rejectIfEmptyOrWhitespace(
+                errors,
+                "title",
+                "Label title can not be empty",
+                title);
+
         final User user = com.wisemapping.security.Utils.getUser();
         assert user != null;
+
         final Label foundLabel = service.getLabelByTitle(title, user);
         if (foundLabel != null) {
             errors.rejectValue("title", Messages.LABEL_TITLE_ALREADY_EXISTS);

wise-webapp/src/main/resources/application.properties

@@ -12,7 +12,7 @@ spring.sql.init.mode=always
 spring.sql.init.platform=hsqldb
 
 # LOG
-logging.level.root=INFO
+logging.level.root=DEBUG
 logging.level.org.apache.tomcat=INFO
 
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