added Close() methods to the structs

writer_binary.go

@@ -20,6 +20,14 @@ func NewOgBinWriter(path string) (*OgBinWriter, error) {
 	}, nil
 }
 
+func (ogw *OgBinWriter) Close() error {
+	if ogw.file != nil {
+		return ogw.file.Close()
+	}
+
+	return nil
+}
+
 func (ogw *OgBinWriter) Write(data []byte) (int, error) {
 	err := binary.Write(ogw.file, binary.LittleEndian, data)
 	if err != nil {