Updated files and created compose.yml for internal database usage

src/main/java/hhn/temp/project/provider/SimpleDatabaseManager.java

@@ -3,15 +3,50 @@ package hhn.temp.project.provider;
 import hhn.temp.project.Task;
 import hhn.temp.project.Worker;
 
+import java.io.File;
+import java.io.IOException;
+import java.net.URISyntaxException;
+import java.nio.file.Files;
+import java.nio.file.Path;
 import java.sql.*;
 import java.util.*;
 
 public class SimpleDatabaseManager implements DatabaseManager {
 
+  private final static Path INSERT_TASK = Path.of("./src/main/resources/sql/InsertTaskTable.sql");
+  private final static Path DELETE_TASK = Path.of("./src/main/resources/sql/DeleteTaskTable.sql");
+  private final static Path SELECT_TASK = Path.of("./src/main/resources/sql/SelectTaskTable.sql");
+  private final static Path UPDATE_TASK = Path.of("./src/main/resources/sql/UpdateTaskTable.sql");
+
   private boolean connected = false;
   private Map<Integer, Task> temporaryTaskList = new HashMap();
   private Map<Integer, Worker> temporaryWorkerList = new HashMap<>();
 
+  public enum QueryMode {
+    INSERT,
+    SELECT,
+    UPDATE,
+    DELETE
+  }
+
+  public String loadFile(QueryMode queryMode) throws IOException, URISyntaxException {
+    switch (queryMode) {
+      case INSERT -> {
+        return Files.readString(INSERT_TASK);
+      }
+      case SELECT -> {
+
+      }
+      case DELETE -> {
+
+      }
+      case UPDATE -> {
+
+      }
+    }
+    return "";
+  }
+
   @Override
   public void saveTask(Task task) throws SQLException {
     if (!connected) {