addressed consistency

internal/writing/csv/writer.go

@@ -10,15 +10,15 @@ import (
 	"github.com/nmoniz/any2anexoj/internal"
 )
 
-type CSVWriter struct {
+type Writer struct {
 	w *csv.Writer
 }
 
-func NewCSVWriter(w io.Writer) *CSVWriter {
-	return &CSVWriter{w: csv.NewWriter(w)}
+func NewWriter(w io.Writer) *Writer {
+	return &Writer{w: csv.NewWriter(w)}
 }
 
-func (cw *CSVWriter) Render(aw *internal.AggregatorWriter) error {
+func (cw *Writer) Render(aw *internal.AggregatorWriter) error {
 	err := cw.w.Write([]string{
 		"source_country", "code",
 		"realization_year", "realization_month", "realization_day", "realization_value",