Patched potential security risk

src/main/java/de/rwu/easydrop/data/connector/SQLiteConnector.java

@@ -369,33 +369,28 @@ public final class SQLiteConnector implements
 
     @Override
     public void clearTXData() {
-        flushTable("transactions");
+        runDeletionQuery("DELETE FROM transactions;");
     }
 
     @Override
     public void clearOfferData() {
-        flushTable("offers");
+        runDeletionQuery("DELETE FROM offers;");
     }
 
     @Override
     public void clearProductData() {
-        flushTable("products");
+        runDeletionQuery("DELETE FROM products;");
     }
 
     /**
-     * Flushes all data from the specified table.
+     * Flushes all data using the specified query.
      *
-     * @param table
+     * @param query
      */
-    private void flushTable(final String table) {
+    private void runDeletionQuery(final String query) {
         try (Connection connection = db.getConnection();
                 Statement statement = connection.createStatement()) {
-            if (table.matches("[\\w]+")) {
+            statement.executeUpdate(query);
-                String query = "DELETE FROM " + table + ";";
-                statement.executeUpdate(query);
-            } else {
-                throw new PersistenceException("Table name contains illegal characters");
-            }
         } catch (SQLException e) {
             throw new PersistenceException("Something went wrong while clearing the database", e);
         }