diff --git a/src/main/java/eirb/pg203/Temperature.java b/src/main/java/eirb/pg203/Temperature.java
new file mode 100644
index 0000000..b9c416b
--- /dev/null
+++ b/src/main/java/eirb/pg203/Temperature.java
@@ -0,0 +1,5 @@
+package eirb.pg203;
+
+public class Temperature {
+
+}
diff --git a/src/main/java/eirb/pg203/WeatherDataAPI.java b/src/main/java/eirb/pg203/WeatherDataAPI.java
new file mode 100644
index 0000000..342b42d
--- /dev/null
+++ b/src/main/java/eirb/pg203/WeatherDataAPI.java
@@ -0,0 +1,5 @@
+package eirb.pg203;
+
+public interface WeatherDataAPI {
+    Temperature getTemperature(int day, String city);
+}
diff --git a/src/main/java/eirb/pg203/WeatherDisplay.java b/src/main/java/eirb/pg203/WeatherDisplay.java
new file mode 100644
index 0000000..ec5b00d
--- /dev/null
+++ b/src/main/java/eirb/pg203/WeatherDisplay.java
@@ -0,0 +1,7 @@
+package eirb.pg203;
+
+public interface WeatherDisplay {
+    void display();
+    
+    void addAPI(WeatherDataAPI w);
+}