diff --git a/src/main/java/org/investovator/core/data/api/CompanyData.java b/src/main/java/org/investovator/core/data/api/CompanyData.java
index 11e789f..76878a1 100644
--- a/src/main/java/org/investovator/core/data/api/CompanyData.java
+++ b/src/main/java/org/investovator/core/data/api/CompanyData.java
@@ -36,6 +36,16 @@ public interface CompanyData {
      */
     public HashMap<String,String> getCompanyIDsNames() throws DataAccessException;
 
+    /**
+     *
+     * @param symbol Company stockId
+     * @param companyName Company name
+     * @param shares number of shares issued
+     * @throws DataAccessException
+     */
+    public void addCompanyData(String symbol, String companyName, int shares)
+            throws DataAccessException;
+
     /**
      *
      * @return Company StockId and number of shares issued pairs
@@ -61,12 +71,22 @@ public interface CompanyData {
 
     /**
      *
-     * @param infotype Information type required
+     * @param infoType Information type required
      * @param symbol StockId of the company
      * @return Data
      * @throws DataAccessException
      */
-    public Object getInfo(String infotype, String symbol) throws DataAccessException;
+    public Object getInfo(String infoType, String symbol) throws DataAccessException;
+
+    /**
+     *
+     * @param infoType Information type ex: annual dividend
+     * @param symbol stockId of the company
+     * @param object data
+     * @throws DataAccessException
+     */
+    public void addInfo(String infoType, String symbol, Object object)
+            throws DataAccessException;
 
     /**
      *
diff --git a/src/main/java/org/investovator/core/data/api/CompanyDataImpl.java b/src/main/java/org/investovator/core/data/api/CompanyDataImpl.java
index 5d638c5..69e28ed 100644
--- a/src/main/java/org/investovator/core/data/api/CompanyDataImpl.java
+++ b/src/main/java/org/investovator/core/data/api/CompanyDataImpl.java
@@ -38,6 +38,16 @@ public HashMap<String,String> getCompanyIDsNames() throws DataAccessException{
         return null; //TODO
     }
 
+    /**
+     *
+     * {@inheritDoc}
+     */
+    @Override
+    public void addCompanyData(String symbol, String companyName, int shares)
+            throws DataAccessException {
+        //TODO
+    }
+
     /**
      *
      * {@inheritDoc}
@@ -74,6 +84,15 @@ public Object getInfo(String infotype, String symbol) throws DataAccessException
         return null; //TODO
     }
 
+    /**
+     *
+     * {@inheritDoc}
+     */
+    @Override
+    public void addInfo(String infotype, String symbol, Object object) throws DataAccessException {
+        //TODO
+    }
+
     /**
      *
      * {@inheritDoc}
diff --git a/src/main/java/org/investovator/core/data/api/UserData.java b/src/main/java/org/investovator/core/data/api/UserData.java
index 164cf37..3960a52 100644
--- a/src/main/java/org/investovator/core/data/api/UserData.java
+++ b/src/main/java/org/investovator/core/data/api/UserData.java
@@ -38,7 +38,12 @@ public void addUser(String username, String firstname,
 
     public HashMap<String, String> getUserDetails(String username) throws DataAccessException;
 
+    public void updateUserDetails(String username, HashMap<String, String> details)
+            throws DataAccessException;
+
     public Portfolio getUserPortfolio(String username) throws DataAccessException;
 
+    public void updateUserPortfolio(String username, Portfolio portfolio) throws DataAccessException;
+
     public ArrayList<String> getWatchList(String username);
 }
diff --git a/src/main/java/org/investovator/core/data/api/UserDataImpl.java b/src/main/java/org/investovator/core/data/api/UserDataImpl.java
index 6ac412f..b7374f0 100644
--- a/src/main/java/org/investovator/core/data/api/UserDataImpl.java
+++ b/src/main/java/org/investovator/core/data/api/UserDataImpl.java
@@ -49,12 +49,22 @@ public HashMap<String, String> getUserDetails(String username)
         return null; //TODO
     }
 
+    @Override
+    public void updateUserDetails(String username, HashMap<String, String> details) throws DataAccessException {
+        //TODO
+    }
+
     @Override
     public Portfolio getUserPortfolio(String username)
             throws DataAccessException {
         return null; //TODO
     }
 
+    @Override
+    public void updateUserPortfolio(String username, Portfolio portfolio) throws DataAccessException {
+        //TODO
+    }
+
     @Override
     public ArrayList<String> getWatchList(String username) {
         return null;  //TODO