first commit

src/main/java/com/andrewkydev/database/query/QueryRunner.java

@@ -0,0 +1,23 @@
+package com.andrewkydev.database.query;
+
+import java.util.List;
+import java.util.concurrent.CompletableFuture;
+
+public interface QueryRunner {
+
+    int execute(String sql);
+
+    int execute(String sql, List<Object> params);
+
+    <T> List<T> query(String sql, RowMapper<T> mapper);
+
+    <T> List<T> query(String sql, List<Object> params, RowMapper<T> mapper);
+
+    CompletableFuture<Integer> executeAsync(String sql);
+
+    CompletableFuture<Integer> executeAsync(String sql, List<Object> params);
+
+    <T> CompletableFuture<List<T>> queryAsync(String sql, RowMapper<T> mapper);
+
+    <T> CompletableFuture<List<T>> queryAsync(String sql, List<Object> params, RowMapper<T> mapper);
+}