diff --git a/buildSrc/src/main/java/org/springframework/boot/build/JavaConventions.java b/buildSrc/src/main/java/org/springframework/boot/build/JavaConventions.java
index e096d9a4afe..5a9fecc81aa 100644
--- a/buildSrc/src/main/java/org/springframework/boot/build/JavaConventions.java
+++ b/buildSrc/src/main/java/org/springframework/boot/build/JavaConventions.java
@@ -20,8 +20,10 @@ import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 import java.util.TreeMap;
 import java.util.function.Consumer;
+import java.util.stream.Collectors;
 
 import io.spring.javaformat.gradle.FormatTask;
 import io.spring.javaformat.gradle.SpringJavaFormatPlugin;
@@ -34,6 +36,8 @@ import org.gradle.api.plugins.JavaBasePlugin;
 import org.gradle.api.plugins.JavaPlugin;
 import org.gradle.api.plugins.quality.CheckstyleExtension;
 import org.gradle.api.plugins.quality.CheckstylePlugin;
+import org.gradle.api.tasks.SourceSet;
+import org.gradle.api.tasks.SourceSetContainer;
 import org.gradle.api.tasks.bundling.Jar;
 import org.gradle.api.tasks.compile.JavaCompile;
 import org.gradle.api.tasks.javadoc.Javadoc;
@@ -97,6 +101,11 @@ class JavaConventions {
 		extractLegalResources.getDestinationDirectory().set(project.getLayout().getBuildDirectory().dir("legal"));
 		extractLegalResources.setResourcesNames(Arrays.asList("LICENSE.txt", "NOTICE.txt"));
 		extractLegalResources.property("version", project.getVersion().toString());
+		SourceSetContainer sourceSets = project.getExtensions().getByType(SourceSetContainer.class);
+		Set<String> sourceJarTaskNames = sourceSets.stream().map(SourceSet::getSourcesJarTaskName)
+				.collect(Collectors.toSet());
+		Set<String> javadocJarTaskNames = sourceSets.stream().map(SourceSet::getJavadocJarTaskName)
+				.collect(Collectors.toSet());
 		project.getTasks().withType(Jar.class, (jar) -> project.afterEvaluate((evaluated) -> {
 			jar.metaInf((metaInf) -> metaInf.from(extractLegalResources));
 			jar.manifest((manifest) -> {
@@ -104,13 +113,25 @@ class JavaConventions {
 				attributes.put("Automatic-Module-Name", project.getName().replace("-", "."));
 				attributes.put("Build-Jdk-Spec", project.property("sourceCompatibility"));
 				attributes.put("Built-By", "Spring");
-				attributes.put("Implementation-Title", project.getDescription());
+				attributes.put("Implementation-Title",
+						determineImplementationTitle(project, sourceJarTaskNames, javadocJarTaskNames, jar));
 				attributes.put("Implementation-Version", project.getVersion());
 				manifest.attributes(attributes);
 			});
 		}));
 	}
 
+	private String determineImplementationTitle(Project project, Set<String> sourceJarTaskNames,
+			Set<String> javadocJarTaskNames, Jar jar) {
+		if (sourceJarTaskNames.contains(jar.getName())) {
+			return "Source for " + project.getName();
+		}
+		if (javadocJarTaskNames.contains(jar.getName())) {
+			return "Javadoc for " + project.getName();
+		}
+		return project.getDescription();
+	}
+
 	private void configureTestConventions(Project project) {
 		project.getTasks().withType(Test.class, (test) -> {
 			withOptionalBuildJavaHome(project, (javaHome) -> test.setExecutable(javaHome + "/bin/java"));
diff --git a/buildSrc/src/test/java/org/springframework/boot/build/ConventionsPluginTests.java b/buildSrc/src/test/java/org/springframework/boot/build/ConventionsPluginTests.java
index d8e92ff1c47..8edb0ed8006 100644
--- a/buildSrc/src/test/java/org/springframework/boot/build/ConventionsPluginTests.java
+++ b/buildSrc/src/test/java/org/springframework/boot/build/ConventionsPluginTests.java
@@ -23,6 +23,7 @@ import java.io.InputStreamReader;
 import java.io.PrintWriter;
 import java.util.Collections;
 import java.util.Map;
+import java.util.jar.Attributes;
 import java.util.jar.JarEntry;
 import java.util.jar.JarFile;
 
@@ -71,23 +72,99 @@ class ConventionsPluginTests {
 			out.println("    id 'java'");
 			out.println("    id 'org.springframework.boot.conventions'");
 			out.println("}");
-			out.println("description 'Test'");
+			out.println("version = '1.2.3'");
+			out.println("sourceCompatibility = '1.8'");
+			out.println("description 'Test project for manifest customization'");
 			out.println("jar.archiveFileName = 'test.jar'");
 		}
 		runGradle("jar");
 		File file = new File(this.projectDir, "/build/libs/test.jar");
 		assertThat(file).exists();
 		try (JarFile jar = new JarFile(file)) {
-			JarEntry license = jar.getJarEntry("META-INF/LICENSE.txt");
-			assertThat(license).isNotNull();
-			JarEntry notice = jar.getJarEntry("META-INF/NOTICE.txt");
-			assertThat(notice).isNotNull();
-			String noticeContent = FileCopyUtils.copyToString(new InputStreamReader(jar.getInputStream(notice)));
-			// Test that variables were replaced
-			assertThat(noticeContent).doesNotContain("${");
+			assertThatLicenseIsPresent(jar);
+			assertThatNoticeIsPresent(jar);
+			Attributes mainAttributes = jar.getManifest().getMainAttributes();
+			assertThat(mainAttributes.getValue("Implementation-Title"))
+					.isEqualTo("Test project for manifest customization");
+			assertThat(mainAttributes.getValue("Automatic-Module-Name"))
+					.isEqualTo(this.projectDir.getName().replace("-", "."));
+			assertThat(mainAttributes.getValue("Implementation-Version")).isEqualTo("1.2.3");
+			assertThat(mainAttributes.getValue("Built-By")).isEqualTo("Spring");
+			assertThat(mainAttributes.getValue("Build-Jdk-Spec")).isEqualTo("1.8");
 		}
 	}
 
+	@Test
+	void sourceJarIsBuilt() throws IOException {
+		try (PrintWriter out = new PrintWriter(new FileWriter(this.buildFile))) {
+			out.println("plugins {");
+			out.println("    id 'java'");
+			out.println("    id 'maven-publish'");
+			out.println("    id 'org.springframework.boot.conventions'");
+			out.println("}");
+			out.println("version = '1.2.3'");
+			out.println("sourceCompatibility = '1.8'");
+			out.println("description 'Test'");
+		}
+		runGradle("build");
+		File file = new File(this.projectDir, "/build/libs/" + this.projectDir.getName() + "-1.2.3-sources.jar");
+		assertThat(file).exists();
+		try (JarFile jar = new JarFile(file)) {
+			assertThatLicenseIsPresent(jar);
+			assertThatNoticeIsPresent(jar);
+			Attributes mainAttributes = jar.getManifest().getMainAttributes();
+			assertThat(mainAttributes.getValue("Implementation-Title"))
+					.isEqualTo("Source for " + this.projectDir.getName());
+			assertThat(mainAttributes.getValue("Automatic-Module-Name"))
+					.isEqualTo(this.projectDir.getName().replace("-", "."));
+			assertThat(mainAttributes.getValue("Implementation-Version")).isEqualTo("1.2.3");
+			assertThat(mainAttributes.getValue("Built-By")).isEqualTo("Spring");
+			assertThat(mainAttributes.getValue("Build-Jdk-Spec")).isEqualTo("1.8");
+		}
+	}
+
+	@Test
+	void javadocJarIsBuilt() throws IOException {
+		try (PrintWriter out = new PrintWriter(new FileWriter(this.buildFile))) {
+			out.println("plugins {");
+			out.println("    id 'java'");
+			out.println("    id 'maven-publish'");
+			out.println("    id 'org.springframework.boot.conventions'");
+			out.println("}");
+			out.println("version = '1.2.3'");
+			out.println("sourceCompatibility = '1.8'");
+			out.println("description 'Test'");
+		}
+		runGradle("build");
+		File file = new File(this.projectDir, "/build/libs/" + this.projectDir.getName() + "-1.2.3-javadoc.jar");
+		assertThat(file).exists();
+		try (JarFile jar = new JarFile(file)) {
+			assertThatLicenseIsPresent(jar);
+			assertThatNoticeIsPresent(jar);
+			Attributes mainAttributes = jar.getManifest().getMainAttributes();
+			assertThat(mainAttributes.getValue("Implementation-Title"))
+					.isEqualTo("Javadoc for " + this.projectDir.getName());
+			assertThat(mainAttributes.getValue("Automatic-Module-Name"))
+					.isEqualTo(this.projectDir.getName().replace("-", "."));
+			assertThat(mainAttributes.getValue("Implementation-Version")).isEqualTo("1.2.3");
+			assertThat(mainAttributes.getValue("Built-By")).isEqualTo("Spring");
+			assertThat(mainAttributes.getValue("Build-Jdk-Spec")).isEqualTo("1.8");
+		}
+	}
+
+	private void assertThatLicenseIsPresent(JarFile jar) {
+		JarEntry license = jar.getJarEntry("META-INF/LICENSE.txt");
+		assertThat(license).isNotNull();
+	}
+
+	private void assertThatNoticeIsPresent(JarFile jar) throws IOException {
+		JarEntry notice = jar.getJarEntry("META-INF/NOTICE.txt");
+		assertThat(notice).isNotNull();
+		String noticeContent = FileCopyUtils.copyToString(new InputStreamReader(jar.getInputStream(notice)));
+		// Test that variables were replaced
+		assertThat(noticeContent).doesNotContain("${");
+	}
+
 	@Test
 	void testRetryIsConfiguredWithThreeRetriesOnCI() throws IOException {
 		try (PrintWriter out = new PrintWriter(new FileWriter(this.buildFile))) {