diff --git a/document/document.go b/document/document.go
index daa0a89..fcbd64b 100644
--- a/document/document.go
+++ b/document/document.go
@@ -7,7 +7,6 @@ import (
 	"mime"
 	"net/http"
 	"os"
-	"strings"
 	"time"
 
 	web "git.to-net.rs/marko.tikvic/webutility"
@@ -49,7 +48,7 @@ func OpenFileAsDocument(path string) (*Document, error) {
 
 	d.FileName = stats.Name()
 	d.Size = stats.Size()
-	d.Extension = FileExtension(d.FileName)
+	d.Extension = web.FileExtension(d.FileName)
 
 	d.data = make([]byte, d.Size)
 	if _, err = f.Read(d.data); err != nil {
@@ -99,18 +98,6 @@ func ServeDocument(w http.ResponseWriter, d *Document, downloadPrompt bool) erro
 	return nil
 }
 
-// FileExists ...
-func FileExists(path string) bool {
-	temp, err := os.Open(path)
-	defer temp.Close()
-
-	if err != nil {
-		return false
-	}
-
-	return true
-}
-
 // ParseDocument ...
 func ParseDocument(req *http.Request) (doc *Document, err error) {
 	req.ParseMultipartForm(32 << 20)
@@ -127,7 +114,7 @@ func ParseDocument(req *http.Request) (doc *Document, err error) {
 	fsize := fheader.Size
 	ftype := fmt.Sprintf("%v", fheader.Header["Content-Type"][0])
 
-	fextn := FileExtension(fname)
+	fextn := web.FileExtension(fname)
 	if fextn == "" {
 		return doc, errors.New("invalid extension")
 	}
@@ -155,31 +142,16 @@ func ParseDocument(req *http.Request) (doc *Document, err error) {
 	return doc, nil
 }
 
-// DirectoryFromPath ...
-func DirectoryFromPath(path string) (dir string) {
-	parts := strings.Split(path, "/")
-	if len(parts) == 1 {
-		return ""
-	}
-
-	dir = parts[0]
-	for _, p := range parts[1 : len(parts)-1] {
-		dir += "/" + p
-	}
-
-	return dir
-}
-
 // SaveToFile ...
 func (d *Document) SaveToFile(path string) (f *os.File, err error) {
 	d.Path = path
 
-	if FileExists(path) {
+	if web.FileExists(path) {
 		err = fmt.Errorf("file %s alredy exists", path)
 		return nil, err
 	}
 
-	if parentDir := DirectoryFromPath(path); parentDir != "" {
+	if parentDir := web.DirectoryFromPath(path); parentDir != "" {
 		if err = os.MkdirAll(parentDir, os.ModePerm); err != nil {
 			if !os.IsExist(err) {
 				return nil, err
@@ -201,10 +173,6 @@ func (d *Document) SaveToFile(path string) (f *os.File, err error) {
 	return f, nil
 }
 
-func DeleteFile(path string) error {
-	return os.Remove(path)
-}
-
 func DeleteDocuments(docs []*Document) error {
 	for _, d := range docs {
 		if err := d.DeleteFile(); err != nil {
@@ -218,11 +186,3 @@ func DeleteDocuments(docs []*Document) error {
 func (d *Document) DeleteFile() error {
 	return os.Remove(d.Path)
 }
-
-func FileExtension(path string) string {
-	parts := strings.Split(path, ".") // because name can contain dots
-	if len(parts) < 2 {
-		return ""
-	}
-	return "." + parts[len(parts)-1]
-}
diff --git a/file_util.go b/file_util.go
index d6e4553..b9991b9 100644
--- a/file_util.go
+++ b/file_util.go
@@ -2,6 +2,7 @@ package webutility
 
 import (
 	"bytes"
+	"fmt"
 	"io"
 	"io/ioutil"
 	"os"
@@ -81,6 +82,48 @@ func ListDir(path string) (fnames []string, err error) {
 }
 
 func WorkingDir() string {
-	dir, _ := os.Getwd()
+	path, err := os.Getwd()
+	if err != nil {
+		fmt.Printf("couldn't get working directory: %s\n", err.Error())
+	}
+	return path
+}
+
+func FileExtension(path string) string {
+	parts := strings.Split(path, ".") // because name can contain dots
+	if len(parts) < 2 {
+		return ""
+	}
+	return "." + parts[len(parts)-1]
+}
+
+func DeleteFile(path string) error {
+	return os.Remove(path)
+}
+
+// DirectoryFromPath ...
+func DirectoryFromPath(path string) (dir string) {
+	parts := strings.Split(path, "/")
+	if len(parts) == 1 {
+		return ""
+	}
+
+	dir = parts[0]
+	for _, p := range parts[1 : len(parts)-1] {
+		dir += "/" + p
+	}
+
 	return dir
 }
+
+// FileExists ...
+func FileExists(path string) bool {
+	temp, err := os.Open(path)
+	defer temp.Close()
+
+	if err != nil {
+		return false
+	}
+
+	return true
+}
diff --git a/float_util.go b/float_util.go
index 999a59b..8167f52 100644
--- a/float_util.go
+++ b/float_util.go
@@ -82,3 +82,13 @@ func FormatFloat64Number(f float64, dec int) string {
 
 	return res
 }
+
+func MaxFlaot64(vars ...float64) (max float64) {
+	max = vars[0]
+	for _, v := range vars {
+		if v > max {
+			max = v
+		}
+	}
+	return max
+}
diff --git a/server.go b/server.go
index 7e309db..bbfb7ab 100644
--- a/server.go
+++ b/server.go
@@ -15,6 +15,7 @@ type Server struct {
 	Logger    *gologger.Logger
 	Port      string
 	UTCOffset int64
+	DBs       map[string]*sql.DB
 }
 
 func NewODBCServer(dsn, port, logDir string, utcOffset int64) (s *Server, err error) {
@@ -34,6 +35,9 @@ func NewODBCServer(dsn, port, logDir string, utcOffset int64) (s *Server, err er
 
 	s.UTCOffset = utcOffset
 
+	s.DBs = make(map[string]*sql.DB)
+	s.DBs["default"] = s.DB
+
 	return s, nil
 }