Added sample code for Spring events and Spring profiles.

spring-all/src/main/java/org/baeldung/profiles/DatasourceConfig.java

@@ -0,0 +1,5 @@
+package org.baeldung.profiles;
+
+public interface DatasourceConfig {
+    public void setup();
+}

spring-all/src/main/java/org/baeldung/profiles/DevDatasourceConfig.java

@@ -0,0 +1,15 @@
+package org.baeldung.profiles;
+
+import org.springframework.context.annotation.Profile;
+import org.springframework.stereotype.Component;
+
+@Component
+@Profile("dev")
+public class DevDatasourceConfig implements DatasourceConfig {
+
+    @Override
+    public void setup() {
+        System.out.println("Setting up datasource for DEV environment. ");
+    }
+
+}

spring-all/src/main/java/org/baeldung/profiles/ProductionDatasourceConfig.java

@@ -0,0 +1,15 @@
+package org.baeldung.profiles;
+
+import org.springframework.context.annotation.Profile;
+import org.springframework.stereotype.Component;
+
+@Component
+@Profile("production")
+public class ProductionDatasourceConfig implements DatasourceConfig {
+
+    @Override
+    public void setup() {
+        System.out.println("Setting up datasource for PRODUCTION environment. ");
+    }
+
+}

spring-all/src/main/java/org/baeldung/profiles/SpringProfilesConfig.java

@@ -0,0 +1,10 @@
+package org.baeldung.profiles;
+
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@ComponentScan("org.baeldung.profiles")
+public class SpringProfilesConfig {
+
+}