Importar arquivo para o STS ou eclipe

Porque o projeto com pom, não está sendo importado ?

pom.xml

<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>br.com.ghsistemas.principal</groupId>
	<artifactId>principal</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>pom</packaging>
	<name>Sistema principal</name>
	<description>Sistema principal</description>
	<organization>
		<name>Netsoft</name>
	</organization>
	<scm>
		<connection>guilherme@netsoft.eti..br</connection>
		<developerConnection>Guilherme Costa Lopes</developerConnection>
	</scm>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.1.7.RELEASE</version>
		<relativePath />
	</parent>

	<modules>
		<module>principal-core</module>
		<module>principal-rest</module>
		<module>principal-utilitario</module>
	</modules>

	<properties>
		<java.version>1.8</java.version>
		<java.encoding>UTF-8</java.encoding>
		<maven.build.timestamp.format>dd/MM/yyyy HH:mm:ss
		</maven.build.timestamp.format>
		<maven.compiler.source>${java.version}</maven.compiler.source>
		<maven.compiler.target>${java.version}</maven.compiler.target>
		<project.build.sourceEncoding>${java.encoding}
		</project.build.sourceEncoding>
		<project.reporting.outputEncoding>${java.encoding}
		</project.reporting.outputEncoding>
		<project.main.basedir>${project.basedir}</project.main.basedir>
		<dependency.commons-io.version>2.5</dependency.commons-io.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</artifactId>
		</dependency>
		<dependency>
			<groupId>joda-time</groupId>
			<artifactId>joda-time</artifactId>
		</dependency>
		<dependency>
			<groupId>org.apache.commons</groupId>
			<artifactId>commons-lang3</artifactId>
		</dependency>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>commons-io</groupId>
			<artifactId>commons-io</artifactId>
			<version>${dependency.commons-io.version}</version>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
			<plugin>
				<artifactId>maven-compiler-plugin</artifactId>
				<configuration>
					<source>${java.version}</source>
					<target>${java.version}</target>
				</configuration>
			</plugin>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-war-plugin</artifactId>
				<configuration>
					<failOnMissingWebXml>false</failOnMissingWebXml>
				</configuration>
			</plugin>
		</plugins>
	</build>
</project>

Alguma ideia ?