Se limpio minimamente el modelo de version

src/danielcortes/xyz/models/version/SQLiteVersionDAO.java

@@ -28,11 +28,9 @@ public class SQLiteVersionDAO extends VersionDAO {
   private boolean tableVersionsExists() {
     try {
       DatabaseMetaData md = this.connectionHolder.getConnection().getMetaData();
-      ResultSet rs = md.getTables(null, null, "version", null);
-      boolean exists = rs.next();
-      rs.close();
-
-      return exists;
+      try(ResultSet rs = md.getTables(null, null, "version", null)) {
+        return rs.next();
+      }
     } catch (SQLException e) {
       e.printStackTrace();
       return false;
@@ -41,17 +39,14 @@ public class SQLiteVersionDAO extends VersionDAO {
 
   private int getCurrentVersion() {
     if (tableVersionsExists()) {
+      String query = "SELECT version FROM version LIMIT 1";
       try (Connection conn = this.connectionHolder.getConnection()) {
-        String query = "SELECT version FROM version LIMIT 1";
-        PreparedStatement ps = conn.prepareStatement(query);
-        ResultSet rs = ps.executeQuery();
-
-        rs.next();
-        int version = rs.getInt(1);
-
-        rs.close();
-        ps.close();
-        return version;
+        try (PreparedStatement ps = conn.prepareStatement(query)) {
+          try (ResultSet rs = ps.executeQuery()) {
+            rs.next();
+            return rs.getInt(1);
+          }
+        }
       } catch (SQLException e) {
         LOGGER.log(Level.SEVERE, e.toString(), e);
       }
@@ -77,17 +72,16 @@ public class SQLiteVersionDAO extends VersionDAO {
 
   private void executeVersionScript(int version) {
     try (Connection conn = this.connectionHolder.getConnection()) {
-      Statement statement = conn.createStatement();
-      InputStream inputStream = getVersionScript(version);
-      BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
-      String line;
-      while ((line = reader.readLine()) != null) {
-        statement.addBatch(line);
+      try(Statement statement = conn.createStatement()) {
+        InputStream inputStream = getVersionScript(version);
+        try(BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream))) {
+          String line;
+          while ((line = reader.readLine()) != null) {
+            statement.addBatch(line);
+          }
+        }
+        statement.executeBatch();
       }
-      reader.close();
-
-      statement.executeBatch();
-      statement.close();
     } catch (SQLException e) {
       e.printStackTrace();
       LOGGER.log(Level.SEVERE, e.toString(), e);
@@ -104,5 +98,4 @@ public class SQLiteVersionDAO extends VersionDAO {
       executeVersionScript(currentVersion);
     }
   }
-
 }