=== added file 'dhis-2/dhis-api/src/main/java/org/hisp/dhis/appmanager/AppStatus.java'
--- dhis-2/dhis-api/src/main/java/org/hisp/dhis/appmanager/AppStatus.java	1970-01-01 00:00:00 +0000
+++ dhis-2/dhis-api/src/main/java/org/hisp/dhis/appmanager/AppStatus.java	2015-10-09 21:43:56 +0000
@@ -0,0 +1,34 @@
+package org.hisp.dhis.appmanager;
+
+/*
+ * Copyright (c) 2004-2015, University of Oslo
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * Neither the name of the HISP project nor the names of its contributors may
+ * be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+public enum AppStatus
+{
+    OK, NAMESPACE_TAKEN;
+}

=== modified file 'dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/appmanager/DefaultAppManager.java'
--- dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/appmanager/DefaultAppManager.java	2015-10-09 21:21:12 +0000
+++ dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/appmanager/DefaultAppManager.java	2015-10-09 21:43:56 +0000
@@ -1,5 +1,31 @@
 package org.hisp.dhis.appmanager;
 
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.stream.Collectors;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipFile;
+
+import javax.annotation.PostConstruct;
+
+import org.apache.ant.compress.taskdefs.Unzip;
+import org.apache.commons.io.FileUtils;
+import org.apache.commons.lang3.StringUtils;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.hisp.dhis.datavalue.DefaultDataValueService;
+import org.hisp.dhis.keyjsonvalue.KeyJsonValueService;
+import org.hisp.dhis.setting.Setting;
+import org.hisp.dhis.setting.SystemSettingManager;
+import org.hisp.dhis.user.CurrentUserService;
+import org.hisp.dhis.user.User;
+import org.hisp.dhis.user.UserCredentials;
+import org.springframework.beans.factory.annotation.Autowired;
+
 /*
  * Copyright (c) 2004-2015, University of Oslo
  * All rights reserved.
@@ -31,33 +57,6 @@
 import com.fasterxml.jackson.databind.DeserializationFeature;
 import com.fasterxml.jackson.databind.ObjectMapper;
 
-import org.apache.ant.compress.taskdefs.Unzip;
-import org.apache.commons.io.FileUtils;
-import org.apache.commons.lang3.StringUtils;
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
-import org.hisp.dhis.datavalue.DefaultDataValueService;
-import org.hisp.dhis.keyjsonvalue.KeyJsonValueService;
-import org.hisp.dhis.setting.Setting;
-import org.hisp.dhis.setting.SystemSettingManager;
-import org.hisp.dhis.user.CurrentUserService;
-import org.hisp.dhis.user.User;
-import org.hisp.dhis.user.UserCredentials;
-import org.springframework.beans.factory.annotation.Autowired;
-
-import javax.annotation.PostConstruct;
-
-import java.io.File;
-import java.io.IOException;
-import java.io.InputStream;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.function.BiConsumer;
-import java.util.stream.Collectors;
-import java.util.zip.ZipEntry;
-import java.util.zip.ZipFile;
-
 /**
  * @author Saptarshi Purkayastha
  */
@@ -146,24 +145,24 @@
         // ---------------------------------------------------------------------
         // Check for namespace and if it's already taken by another app
         // ---------------------------------------------------------------------
+        
         String appNamespace = app.getActivities().getDhis().getNamespace();
-        if ( appNamespace != null &&
-            ( this.appNamespaces.containsKey( appNamespace ) && !app.equals( appNamespaces.get( appNamespace ) ) ) )
+        if ( appNamespace != null && ( this.appNamespaces.containsKey( appNamespace ) && 
+            !app.equals( appNamespaces.get( appNamespace ) ) ) )
         {
             return AppStatus.NAMESPACE_TAKEN;
         }
 
-
         // ---------------------------------------------------------------------
         // Delete if app is already installed
         // ---------------------------------------------------------------------
+        
         if ( getApps().contains( app ) )
         {
             String folderPath = getAppFolderPath() + File.separator + app.getFolderName();
             FileUtils.forceDelete( new File( folderPath ) );
         }
 
-
         String dest = getAppFolderPath() + File.separator + fileName.substring( 0, fileName.lastIndexOf( '.' ) );
         Unzip unzip = new Unzip();
         unzip.setSrc( file );