diff --git a/src/main/java/ru/ulstu/db/DbFileService.java b/src/main/java/ru/ulstu/db/DbFileService.java
index de69472..220be1a 100644
--- a/src/main/java/ru/ulstu/db/DbFileService.java
+++ b/src/main/java/ru/ulstu/db/DbFileService.java
@@ -72,24 +72,31 @@ public class DbFileService implements DbService {
     }
 
     @Override
-    public boolean addSet(String key) {
+    public void addSet(String key) {
         TimeSeriesSet timeSeriesSet = new TimeSeriesSet(key);
         if (isTimeSeriesSetExists(timeSeriesSet)) {
             throw new RuntimeException(String.format("Time series set %s already exists", timeSeriesSet.getKey()));
         } else {
-            return Paths.get(timeSeriesDbPath, timeSeriesSet.getKey()).toFile().mkdirs();
+            Paths.get(timeSeriesDbPath, timeSeriesSet.getKey()).toFile().mkdirs();
         }
     }
 
     @Override
-    public boolean addTimeSeries(TimeSeriesSet timeSeriesSet, TimeSeries timeSeries) throws IOException {
+    public void addTimeSeries(TimeSeriesSet timeSeriesSet, TimeSeries timeSeries) throws IOException {
         if (!isTimeSeriesSetExists(timeSeriesSet)) {
             addSet(timeSeriesSet.getKey());
         }
         BufferedWriter writer = new BufferedWriter(new FileWriter(Paths.get(getSetPath(timeSeriesSet).getAbsolutePath(), timeSeries.getName() + ".csv").toFile()));
         writer.write(new UtilService().getTimeSeriesToDateValueString(timeSeries));
         writer.close();
-        return true;
+        createMetaFile(timeSeriesSet, timeSeries);
+    }
+
+    private void createMetaFile(TimeSeriesSet timeSeriesSet, TimeSeries timeSeries) throws IOException {
+        TimeSeriesMeta timeSeriesMeta = new TimeSeriesMeta(timeSeries);
+        new ObjectMapper()
+                .writeValue(Paths.get(getSetPath(timeSeriesSet).getAbsolutePath(), timeSeries.getName() + ".csv.meta")
+                        .toFile(), timeSeriesMeta);
     }
 
     @Override
@@ -138,7 +145,7 @@ public class DbFileService implements DbService {
     }
 
     private List<File> getTimeSeriesMetaFiles(TimeSeriesSet timeSeriesSet) {
-        return Arrays.asList(getSetPath(timeSeriesSet).listFiles(f -> f.getName().endsWith(".meta")));
+        return Arrays.asList(getSetPath(timeSeriesSet).listFiles(f -> f.getName().endsWith(".csv.meta")));
     }
 
     private File getTimeSeriesFile(TimeSeriesSet timeSeriesSet, String timeSeriesKey) {
diff --git a/src/main/java/ru/ulstu/db/DbService.java b/src/main/java/ru/ulstu/db/DbService.java
index f24bea7..a3457e9 100644
--- a/src/main/java/ru/ulstu/db/DbService.java
+++ b/src/main/java/ru/ulstu/db/DbService.java
@@ -20,9 +20,9 @@ public interface DbService {
 
     TimeSeries getTimeSeries(TimeSeriesSet timeSeriesSet, String timeSeriesKey) throws IOException;
 
-    boolean addSet(String key);
+    void addSet(String key);
 
-    boolean addTimeSeries(TimeSeriesSet timeSeriesSet, TimeSeries timeSeries) throws IOException;
+    void addTimeSeries(TimeSeriesSet timeSeriesSet, TimeSeries timeSeries) throws IOException;
 
     void deleteTimeSeries(TimeSeriesSet set, String timeSeriesKey) throws IOException;
 
diff --git a/src/main/java/ru/ulstu/db/model/TimeSeriesMeta.java b/src/main/java/ru/ulstu/db/model/TimeSeriesMeta.java
index a885d1f..f0e1c5d 100644
--- a/src/main/java/ru/ulstu/db/model/TimeSeriesMeta.java
+++ b/src/main/java/ru/ulstu/db/model/TimeSeriesMeta.java
@@ -6,11 +6,22 @@
 
 package ru.ulstu.db.model;
 
+import ru.ulstu.datamodel.ts.TimeSeries;
+
 public class TimeSeriesMeta {
     private String key;
     private int size;
     private boolean hasDateTime;
 
+    public TimeSeriesMeta() {
+    }
+
+    public TimeSeriesMeta(TimeSeries timeSeries) {
+        this.key = timeSeries.getName();
+        this.hasDateTime = timeSeries.getValues().stream().anyMatch(v -> v.getDate() != null);
+        this.size = timeSeries.getLength();
+    }
+
     public String getKey() {
         return key;
     }