replaced logic of character random generation

src/main/java/mate/academy/rickandmorty/config/WebAppConfig.java

@@ -0,0 +1,13 @@
+package mate.academy.rickandmorty.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.client.RestTemplate;
+
+@Configuration
+public class WebAppConfig {
+    @Bean
+    public RestTemplate restTemplate() {
+        return new RestTemplate();
+    }
+}

src/main/java/mate/academy/rickandmorty/exception/CharacterNotFoundException.java

@@ -0,0 +1,7 @@
+package mate.academy.rickandmorty.exception;
+
+public class CharacterNotFoundException extends RuntimeException {
+    public CharacterNotFoundException(String message) {
+        super(message);
+    }
+}

src/main/java/mate/academy/rickandmorty/exception/RetrieveDataException.java

@@ -0,0 +1,7 @@
+package mate.academy.rickandmorty.exception;
+
+public class RetrieveDataException extends RuntimeException {
+    public RetrieveDataException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}