diff --git a/wise-webapp/src/main/java/com/wisemapping/model/MindMap.java b/wise-webapp/src/main/java/com/wisemapping/model/MindMap.java
deleted file mode 100644
index e2eb0dad..00000000
--- a/wise-webapp/src/main/java/com/wisemapping/model/MindMap.java
+++ /dev/null
@@ -1,275 +0,0 @@
-/*
-*    Copyright [2011] [wisemapping]
-*
-*   Licensed under WiseMapping Public License, Version 1.0 (the "License").
-*   It is basically the Apache License, Version 2.0 (the "License") plus the
-*   "powered by wisemapping" text requirement on every single page;
-*   you may not use this file except in compliance with the License.
-*   You may obtain a copy of the license at
-*
-*       http://www.wisemapping.org/license
-*
-*   Unless required by applicable law or agreed to in writing, software
-*   distributed under the License is distributed on an "AS IS" BASIS,
-*   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-*   See the License for the specific language governing permissions and
-*   limitations under the License.
-*/
-
-package com.wisemapping.model;
-
-import com.wisemapping.exceptions.WiseMappingException;
-import com.wisemapping.util.ZipUtils;
-import org.apache.commons.lang.StringEscapeUtils;
-import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
-
-import java.io.IOException;
-import java.io.UnsupportedEncodingException;
-import java.util.Calendar;
-import java.util.Date;
-import java.util.HashSet;
-import java.util.Set;
-
-public class Mindmap {
-    private static final String UTF_8 = "UTF-8";
-
-    //~ Instance fields ......................................................................................
-    private int id;
-    private Calendar creationTime;
-    private String description;
-
-    private boolean isPublic;
-    private Calendar lastModificationTime;
-    private User lastEditor;
-
-    private Set<Collaboration> collaborations = new HashSet<Collaboration>();
-
-    private User creator;
-    private String tags;
-    private String title;
-    private byte[] xml;
-
-    //~ Constructors .........................................................................................
-
-    public Mindmap() {
-    }
-
-    //~ Methods ..............................................................................................
-
-    public void setXml(byte[] xml) {
-        this.xml = xml;
-    }
-
-    public void setXmlStr(@NotNull String xml)
-            throws IOException {
-        this.xml = xml.getBytes(UTF_8);
-    }
-
-    public byte[] getXml() {
-        return xml;
-    }
-
-    public String getXmlStr() throws UnsupportedEncodingException {
-        String result = null;
-        if (this.xml != null) {
-            result = new String(this.xml, UTF_8);
-        }
-        return result;
-    }
-
-    public byte[] getZippedXml()
-            throws IOException {
-        byte[] result = this.xml;
-        if (result != null) {
-            result = ZipUtils.stringToZip(new String(result, UTF_8));
-        }
-        return result;
-    }
-
-    public void setZippedXml(byte[] xml)
-            throws IOException {
-        this.xml = ZipUtils.zipToString(xml).getBytes(UTF_8);
-    }
-
-    public Set<Collaboration> getCollaborations() {
-        return collaborations;
-    }
-
-    public void setCollaborations(Set<Collaboration> collaborations) {
-        this.collaborations = collaborations;
-    }
-
-    public void addCollaboration(@NotNull Collaboration collaboration) {
-        collaborations.add(collaboration);
-    }
-
-    public void removedCollaboration(@NotNull Collaboration collaboration) {
-        collaborations.add(collaboration);
-    }
-
-    @Nullable
-    public Collaboration findCollaboration(@NotNull Collaborator collaborator) {
-        return this.findCollaboration(collaborator.getEmail());
-    }
-
-    @Nullable
-    public Collaboration findCollaboration(@NotNull String email) {
-        Collaboration result = null;
-        for (Collaboration collaboration : collaborations) {
-            if (collaboration.getCollaborator().getEmail().equals(email)) {
-                result = collaboration;
-                break;
-            }
-        }
-        return result;
-    }
-
-    public boolean isPublic() {
-        return isPublic;
-    }
-
-    public void setPublic(boolean isPublic) {
-        this.isPublic = isPublic;
-    }
-
-    public Calendar getLastModificationTime() {
-        return lastModificationTime;
-    }
-
-    public Date getLastModificationDate() {
-        return new Date();
-    }
-
-    public void setLastModificationTime(Calendar lastModificationTime) {
-        this.lastModificationTime = lastModificationTime;
-    }
-
-    @Nullable
-    public User getLastEditor() {
-        return lastEditor;
-    }
-
-    public void setLastEditor(@Nullable User lastEditor) {
-        this.lastEditor = lastEditor;
-    }
-
-    public int getId() {
-        return id;
-    }
-
-    public void setId(int id) {
-        this.id = id;
-    }
-
-    public String getTitle() {
-        return title;
-    }
-
-    public void setTitle(String title) {
-        this.title = title;
-    }
-
-    public String getXmlAsJsLiteral()
-            throws IOException {
-        String xml = this.getXmlStr();
-        if (xml != null) {
-            xml = StringEscapeUtils.escapeJavaScript(xml);
-        }
-        return xml;
-    }
-
-
-    public void setTags(String tags) {
-        this.tags = tags;
-    }
-
-    public String getTags() {
-        return tags;
-    }
-
-    public String getDescription() {
-        return description;
-    }
-
-    public void setDescription(String description) {
-        this.description = description;
-    }
-
-    public Calendar getCreationTime() {
-        return creationTime;
-    }
-
-    public void setCreationTime(Calendar creationTime) {
-        this.creationTime = creationTime;
-    }
-
-    public void setCreator(@NotNull User creator) {
-        if (creator == null) {
-            throw new IllegalArgumentException("Owner can not be null");
-        }
-        this.creator = creator;
-    }
-
-    public User getCreator() {
-        return creator;
-    }
-
-    private CollaborationProperties findUserProperty(@NotNull Collaborator collaborator) {
-        final Collaboration collaboration = this.findCollaboration(collaborator);
-        return collaboration != null ? collaboration.getCollaborationProperties() : null;
-    }
-
-    public void setStarred(@NotNull Collaborator collaborator, boolean value) throws WiseMappingException {
-        final CollaborationProperties collaborationProperties = findCollaborationProperties(collaborator);
-        collaborationProperties.setStarred(value);
-    }
-
-    @NotNull
-    public CollaborationProperties findCollaborationProperties(@NotNull Collaborator collaborator) throws WiseMappingException {
-        if (collaborator == null) {
-            throw new IllegalStateException("Collaborator can not be null");
-        }
-
-        final Collaboration collaboration = this.findCollaboration(collaborator);
-        if (collaboration == null) {
-            throw new WiseMappingException("User is not collaborator");
-        }
-        return collaboration.getCollaborationProperties();
-    }
-
-    public boolean isStarred(@NotNull Collaborator collaborator) {
-        final CollaborationProperties collaboratorProperty = this.findUserProperty(collaborator);
-        return collaboratorProperty != null && collaboratorProperty.getStarred();
-    }
-
-    public static String getDefaultMindmapXml(@NotNull final String title) {
-
-        final StringBuilder result = new StringBuilder();
-        result.append("<map version=\"tango\">");
-        result.append("<topic central=\"true\" text=\"");
-        result.append(StringEscapeUtils.escapeXml(title));
-        result.append("\"/></map>");
-        return result.toString();
-    }
-
-    public Mindmap shallowClone() {
-        final Mindmap result = new Mindmap();
-        result.setDescription(this.getDescription());
-        result.setTitle(this.getTitle());
-        result.setXml(this.getXml());
-        result.setTags(this.getTags());
-
-        return result;
-    }
-
-    public boolean hasPermissions(@NotNull Collaborator collaborator, @NotNull CollaborationRole role) {
-        final Collaboration collaboration = this.findCollaboration(collaborator);
-        boolean result = false;
-        if (collaboration != null) {
-            result = collaboration.hasPermissions(role);
-        }
-        return result;
-
-    }
-}