rest api for label and hibernate mapping

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

@@ -0,0 +1,49 @@
+package com.wisemapping.model;
+
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+public class Label {
+
+    //~ Instance fields ......................................................................................
+    private int id;
+    @NotNull private String title;
+    @NotNull private User creator;
+    @Nullable private Label parent;
+
+    public void setParent(@Nullable Label parent) {
+        this.parent = parent;
+    }
+
+    @Nullable
+    public Label getParent() {
+        return parent;
+    }
+
+    public void setCreator(@NotNull User creator) {
+        this.creator = creator;
+    }
+
+    @NotNull
+    public User getCreator() {
+        return creator;
+    }
+
+    @NotNull
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(@NotNull String title) {
+        this.title = title;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+}