BAEL-3929: added unused maven dependencies example.

maven-all/maven-unused-dependencies/pom.xml

@@ -0,0 +1,30 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>com.baeldung</groupId>
+    <artifactId>maven-unused-dependencies</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+
+    <dependencies>
+        <dependency>
+            <groupId>commons-collections</groupId>
+            <artifactId>commons-collections</artifactId>
+            <version>3.2.2</version>
+        </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-api</artifactId>
+            <version>1.7.25</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <artifactId>maven-dependency-plugin</artifactId>
+                <version>3.1.1</version>
+            </plugin>
+        </plugins>
+    </build>
+</project>

maven-all/maven-unused-dependencies/src/main/java/com/baeldung/Main.java

@@ -0,0 +1,20 @@
+package com.baeldung;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.slf4j.LoggerFactory;
+
+public class Main {
+
+    public static void main(String[] args) {
+        Map<String, String> teamMap = new HashMap<>();
+        teamMap.put("Dallas", "Cowboys");
+        teamMap.put("Green Bay", "Packers");
+        teamMap.put("Washington", "Redskins");
+
+        LoggerFactory.getLogger(Main.class)
+            .info("Team Map: {}", teamMap);
+
+    }
+}